diff --git a/Marlin/Makefile b/Marlin/Makefile
index a62bccd420..1ffaa2b929 100644
--- a/Marlin/Makefile
+++ b/Marlin/Makefile
@@ -237,6 +237,8 @@ else ifeq ($(HARDWARE_MOTHERBOARD),31)
 else ifeq ($(HARDWARE_MOTHERBOARD),441)
 # TRONXY V3 1.0
 else ifeq ($(HARDWARE_MOTHERBOARD),442)
+# Z-Bolt X Series
+else ifeq ($(HARDWARE_MOTHERBOARD),550)
 
 #
 # Other ATmega1280, ATmega2560
@@ -288,6 +290,8 @@ else ifeq ($(HARDWARE_MOTHERBOARD),75)
 else ifeq ($(HARDWARE_MOTHERBOARD),76)
 # Geeetech GT2560 Rev B for A20(M/D)
 else ifeq ($(HARDWARE_MOTHERBOARD),86)
+# Einstart retrofit
+else ifeq ($(HARDWARE_MOTHERBOARD),666)
 
 #
 # ATmega1281, ATmega2561
diff --git a/Marlin/src/core/boards.h b/Marlin/src/core/boards.h
index 86ca7f0be1..d75084bd02 100644
--- a/Marlin/src/core/boards.h
+++ b/Marlin/src/core/boards.h
@@ -91,6 +91,7 @@
 #define BOARD_DUPLICATOR_I3_PLUS 31   // Wanhao Duplicator i3 Plus
 #define BOARD_VORON             441   // VORON Design
 #define BOARD_TRONXY_V3_1_0     442   // Tronxy TRONXY-V3-1.0
+#define BOARD_Z_BOLT_X_SERIES   550   // Z-Bolt X Series
 
 //
 // Other ATmega1280, ATmega2560
diff --git a/Marlin/src/pins/pins.h b/Marlin/src/pins/pins.h
index f7352e0a07..8ecfadb633 100644
--- a/Marlin/src/pins/pins.h
+++ b/Marlin/src/pins/pins.h
@@ -170,6 +170,8 @@
   #include "pins_VORON.h"             // ATmega2560                                 env:megaatmega2560
 #elif MB(TRONXY_V3_1_0)
   #include "pins_TRONXY_V3_1_0.h"     // ATmega2560                                 env:megaatmega2560
+#elif MB(Z_BOLT_X_SERIES)
+  #include "pins_Z_BOLT_X_SERIES.h"   // ATmega2560                                 env:megaatmega2560
 
 //
 // Other ATmega1280, ATmega2560
diff --git a/Marlin/src/pins/pins_EINSTART-S.h b/Marlin/src/pins/pins_EINSTART-S.h
index c078a2d9c6..1bce75d22b 100755
--- a/Marlin/src/pins/pins_EINSTART-S.h
+++ b/Marlin/src/pins/pins_EINSTART-S.h
@@ -42,28 +42,28 @@
 //
 // Limit Switches
 //
-#define X_STOP_PIN         44   // 2560 PIN 40
-#define Y_STOP_PIN         43   // 2560 PIN 41
-#define Z_STOP_PIN         42   // 2560 PIN 42
+#define X_STOP_PIN         44
+#define Y_STOP_PIN         43
+#define Z_STOP_PIN         42
 
 //
 // Steppers
 //
-#define X_STEP_PIN         76   // 2560 PIN 68
-#define X_DIR_PIN          75   // 2560 PIN 67
-#define X_ENABLE_PIN       73   // 2560 PIN 66
+#define X_STEP_PIN         76
+#define X_DIR_PIN          75
+#define X_ENABLE_PIN       73
 
-#define Y_STEP_PIN         31   // 2560 PIN 59
-#define Y_DIR_PIN          32   // 2560 PIN 58
-#define Y_ENABLE_PIN       72   // 2560 PIN 65
+#define Y_STEP_PIN         31
+#define Y_DIR_PIN          32
+#define Y_ENABLE_PIN       72
 
-#define Z_STEP_PIN         34   // 2560 PIN 56
-#define Z_DIR_PIN          35   // 2560 PIN 55
-#define Z_ENABLE_PIN       33   // 2560 PIN 57
+#define Z_STEP_PIN         34
+#define Z_DIR_PIN          35
+#define Z_ENABLE_PIN       33
 
-#define E0_STEP_PIN        36   // 2560 PIN 54
-#define E0_DIR_PIN         37   // 2560 PIN 53
-#define E0_ENABLE_PIN      30   // 2560 PIN 60
+#define E0_STEP_PIN        36
+#define E0_DIR_PIN         37
+#define E0_ENABLE_PIN      30
 
 //
 // Temperature Sensors
@@ -74,16 +74,16 @@
 //
 // Heaters / Fans
 //
-#define HEATER_0_PIN       83   // 2560 PIN 49
-#define HEATER_BED_PIN     38   // 2560 PIN 50
+#define HEATER_0_PIN       83
+#define HEATER_BED_PIN     38
 
-#define FAN_PIN            82   // 2560 PIN 48
+#define FAN_PIN            82
 
 //
 // Misc. Functions
 //
-#define SDSS               53   // 2560 PIN 19
-#define LED_PIN             4   // 2560 PIN 1
+#define SDSS               53
+#define LED_PIN             4
 
 //////////////////////////
 // LCDs and Controllers //
@@ -97,24 +97,24 @@
 // u8glib constructor
 // U8GLIB_SH1106_128X64 u8g(DOGLCD_SCK, DOGLCD_MOSI, DOGLCD_CS, LCD_PINS_DC, LCD_PINS_RS);
 
-#define LCD_PINS_DC        78   // 2560 PIN 4
-#define LCD_PINS_RS        79   // 2560 PIN 8
+#define LCD_PINS_DC        78
+#define LCD_PINS_RS        79
 // DOGM SPI LCD Support
-#define DOGLCD_CS           3   // 2560 PIN 7
-#define DOGLCD_MOSI         2   // 2560 PIN 6
-#define DOGLCD_SCK          5   // 2560 PIN 5
-#define DOGLCD_A0           2   // 2560 PIN 6
+#define DOGLCD_CS           3
+#define DOGLCD_MOSI         2
+#define DOGLCD_SCK          5
+#define DOGLCD_A0           2
 
 //
 // LCD Display input pins
 //
-#define BTN_UP             25   // 2560 PIN 75
-#define BTN_DWN            26   // 2560 PIN 74
-#define BTN_LFT            27   // 2560 PIN 73
-#define BTN_RT             28   // 2560 PIN 72
+#define BTN_UP             25
+#define BTN_DWN            26
+#define BTN_LFT            27
+#define BTN_RT             28
 
 // 'OK' button
-#define BTN_ENC            29   // 2560 PIN 71
+#define BTN_ENC            29
 
 // Set Kill to right arrow, same as RIGID_PANEL
-#define KILL_PIN           28   // 2560 PIN 72
+#define KILL_PIN           28
diff --git a/Marlin/src/pins/pins_Z_BOLT_X_SERIES.h b/Marlin/src/pins/pins_Z_BOLT_X_SERIES.h
new file mode 100644
index 0000000000..82673b9a2d
--- /dev/null
+++ b/Marlin/src/pins/pins_Z_BOLT_X_SERIES.h
@@ -0,0 +1,257 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ *  Z-Bolt X Series board – based on Arduino Mega2560 
+ */
+
+#if HOTENDS > 4 || E_STEPPERS > 4
+  #error "Z-Bolt X Series board supports up to 4 hotends / E-steppers."
+#endif
+
+#define BOARD_NAME "Z-Bolt X Series"
+
+#if ENABLED(TARGET_LPC1768)
+  #error "Oops! Set MOTHERBOARD to an LPC1768-based board when building for LPC1768."
+#elif defined(__STM32F1__)
+  #error "Oops! Set MOTHERBOARD to an STM32F1-based board when building for STM32F1."
+#endif
+
+#if DISABLED(IS_RAMPS_SMART, IS_RAMPS_DUO, IS_RAMPS4DUE, TARGET_LPC1768)
+  #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
+    #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
+  #endif
+#endif
+
+//
+// Servos
+//
+#ifndef SERVO0_PIN
+  #define SERVO0_PIN       11
+#endif
+#ifndef SERVO3_PIN
+  #define SERVO3_PIN        4
+#endif
+
+//
+// Limit Switches
+//
+#define X_MIN_PIN           3
+#ifndef X_MAX_PIN
+  #define X_MAX_PIN         2
+#endif
+#define Y_MIN_PIN          14
+#define Y_MAX_PIN          15
+#define Z_MIN_PIN          18
+#define Z_MAX_PIN          19
+
+//
+// Z Probe (when not Z_MIN_PIN)
+//
+#ifndef Z_MIN_PROBE_PIN
+  #define Z_MIN_PROBE_PIN  32
+#endif
+
+//
+// Steppers
+//
+#define X_STEP_PIN         54
+#define X_DIR_PIN          55
+#define X_ENABLE_PIN       38
+#ifndef X_CS_PIN
+  #define X_CS_PIN         -1
+#endif
+
+#define Y_STEP_PIN         60
+#define Y_DIR_PIN          61
+#define Y_ENABLE_PIN       56
+#ifndef Y_CS_PIN
+  #define Y_CS_PIN         -1
+#endif
+
+#define Z_STEP_PIN         46
+#define Z_DIR_PIN          48
+#define Z_ENABLE_PIN       62
+#ifndef Z_CS_PIN
+  #define Z_CS_PIN         -1
+#endif
+
+#define E0_STEP_PIN        26
+#define E0_DIR_PIN         28
+#define E0_ENABLE_PIN      24
+#ifndef E0_CS_PIN
+  #define E0_CS_PIN        -1
+#endif
+
+#define E1_STEP_PIN        36
+#define E1_DIR_PIN         34
+#define E1_ENABLE_PIN      30
+#ifndef E1_CS_PIN
+  #define E1_CS_PIN        -1
+#endif
+
+// Red
+#define E2_STEP_PIN        42
+#define E2_DIR_PIN         40
+#define E2_ENABLE_PIN      65
+#ifndef E2_CS_PIN
+  #define E2_CS_PIN        -1
+#endif
+
+// Black
+#define E3_STEP_PIN        44
+#define E3_DIR_PIN         64
+#define E3_ENABLE_PIN      66
+#ifndef E3_CS_PIN
+  #define E3_CS_PIN        -1
+#endif
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN         13   // Analog Input
+#define TEMP_1_PIN         15   // Analog Input
+#define TEMP_2_PIN          5   // Analog Input (BLACK)
+#define TEMP_3_PIN          9   // Analog Input (RED)
+#define TEMP_BED_PIN       14   // Analog Input
+
+//
+// Heaters / Fans
+//
+#define HEATER_0_PIN       10
+#define HEATER_1_PIN        7
+#define HEATER_2_PIN        6
+#define HEATER_3_PIN        5
+#define HEATER_BED_PIN      8
+
+#define FAN_PIN             9
+
+//
+// Misc. Functions
+//
+#define SDSS               53
+#define LED_PIN            13
+
+#ifndef FILWIDTH_PIN
+  #define FILWIDTH_PIN      5   // Analog Input on AUX2
+#endif
+
+// Оn the servos connector
+#ifndef FIL_RUNOUT_PIN
+  #define FIL_RUNOUT_PIN    4
+#endif
+
+#ifndef PS_ON_PIN
+  #define PS_ON_PIN        12
+#endif
+
+#define AUX2_PINS_FREE !( BOTH(ULTRA_LCD, NEWPANEL) && ANY(PANEL_ONE, VIKI2, miniVIKI, MINIPANEL, REPRAPWORLD_KEYPAD) )
+
+#if ENABLED(CASE_LIGHT_ENABLE) && !defined(CASE_LIGHT_PIN) && !defined(SPINDLE_LASER_ENA_PIN)
+  #if NUM_SERVOS <= 1 // try to use servo connector first
+    #define CASE_LIGHT_PIN    6   // MUST BE HARDWARE PWM
+  #elif AUX2_PINS_FREE
+    #define CASE_LIGHT_PIN   44   // MUST BE HARDWARE PWM
+  #endif
+#endif
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if ENABLED(SPINDLE_LASER_ENABLE) && !PIN_EXISTS(SPINDLE_LASER_ENA)
+  #if !defined(NUM_SERVOS) || NUM_SERVOS == 0 // try to use servo connector first
+    #define SPINDLE_LASER_ENA_PIN     4   // Pin should have a pullup/pulldown!
+    #define SPINDLE_LASER_PWM_PIN     6   // MUST BE HARDWARE PWM
+    #define SPINDLE_DIR_PIN           5
+  #elif AUX2_PINS_FREE
+    #define SPINDLE_LASER_ENA_PIN    40   // Pin should have a pullup/pulldown!
+    #define SPINDLE_LASER_PWM_PIN    44   // MUST BE HARDWARE PWM
+    #define SPINDLE_DIR_PIN          65
+  #endif
+#endif
+
+#undef AUX2_PINS_FREE
+
+//
+// TMC software SPI
+//
+#if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
+    #define TMC_SW_MOSI    66
+  #endif
+  #ifndef TMC_SW_MISO
+    #define TMC_SW_MISO    44
+  #endif
+  #ifndef TMC_SW_SCK
+    #define TMC_SW_SCK     64
+  #endif
+#endif
+
+#if HAS_DRIVER(TMC2208)
+  /**
+   * TMC2208 stepper drivers
+   *
+   * Hardware serial communication ports.
+   * If undefined software serial is used according to the pins below
+   */
+  //#define X_HARDWARE_SERIAL  Serial1
+  //#define X2_HARDWARE_SERIAL Serial1
+  //#define Y_HARDWARE_SERIAL  Serial1
+  //#define Y2_HARDWARE_SERIAL Serial1
+  //#define Z_HARDWARE_SERIAL  Serial1
+  //#define Z2_HARDWARE_SERIAL Serial1
+  //#define E0_HARDWARE_SERIAL Serial1
+  //#define E1_HARDWARE_SERIAL Serial1
+  //#define E2_HARDWARE_SERIAL Serial1
+  //#define E3_HARDWARE_SERIAL Serial1
+  //#define E4_HARDWARE_SERIAL Serial1
+
+  //
+  // Software serial
+  //
+
+  #define X_SERIAL_TX_PIN    40
+  #define X_SERIAL_RX_PIN    63
+  #define X2_SERIAL_TX_PIN   -1
+  #define X2_SERIAL_RX_PIN   -1
+
+  #define Y_SERIAL_TX_PIN    59
+  #define Y_SERIAL_RX_PIN    64
+  #define Y2_SERIAL_TX_PIN   -1
+  #define Y2_SERIAL_RX_PIN   -1
+
+  #define Z_SERIAL_TX_PIN    42
+  #define Z_SERIAL_RX_PIN    65
+  #define Z2_SERIAL_TX_PIN   -1
+  #define Z2_SERIAL_RX_PIN   -1
+
+  #define E0_SERIAL_TX_PIN   44
+  #define E0_SERIAL_RX_PIN   66
+  #define E1_SERIAL_TX_PIN   -1
+  #define E1_SERIAL_RX_PIN   -1
+  #define E2_SERIAL_TX_PIN   -1
+  #define E2_SERIAL_RX_PIN   -1
+  #define E3_SERIAL_TX_PIN   -1
+  #define E3_SERIAL_RX_PIN   -1
+  #define E4_SERIAL_TX_PIN   -1
+  #define E4_SERIAL_RX_PIN   -1
+#endif