diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm
index 999e450bb..1579d85db 100644
--- a/lib/Slic3r.pm
+++ b/lib/Slic3r.pm
@@ -149,6 +149,7 @@ sub thread_cleanup {
     *Slic3r::Geometry::BoundingBoxf3::DESTROY = sub {};
     *Slic3r::Line::DESTROY                  = sub {};
     *Slic3r::Point::DESTROY                 = sub {};
+    *Slic3r::Pointf::DESTROY                = sub {};
     *Slic3r::Pointf3::DESTROY               = sub {};
     *Slic3r::Polygon::DESTROY               = sub {};
     *Slic3r::Polyline::DESTROY              = sub {};
diff --git a/lib/Slic3r/GCode.pm b/lib/Slic3r/GCode.pm
index 37eed4797..8adfd2126 100644
--- a/lib/Slic3r/GCode.pm
+++ b/lib/Slic3r/GCode.pm
@@ -343,8 +343,8 @@ sub extrude_path {
     my $path_length = unscale $path->length;
     {
         $gcode .= $path->gcode($self->extruder, $e, $F,
-            $self->shift_x - $self->extruder->extruder_offset->[X],
-            $self->shift_y - $self->extruder->extruder_offset->[Y],
+            $self->shift_x - $self->extruder->extruder_offset->x,
+            $self->shift_y - $self->extruder->extruder_offset->y,  #,,
             $self->_extrusion_axis,
             $self->print_config->gcode_comments ? " ; $description" : "");
 
@@ -587,8 +587,8 @@ sub _G0_G1 {
     
     if ($point) {
         $gcode .= sprintf " X%.3f Y%.3f", 
-            ($point->x * &Slic3r::SCALING_FACTOR) + $self->shift_x - $self->extruder->extruder_offset->[X],
-            ($point->y * &Slic3r::SCALING_FACTOR) + $self->shift_y - $self->extruder->extruder_offset->[Y]; #**
+            ($point->x * &Slic3r::SCALING_FACTOR) + $self->shift_x - $self->extruder->extruder_offset->x,
+            ($point->y * &Slic3r::SCALING_FACTOR) + $self->shift_y - $self->extruder->extruder_offset->y; #**
         $self->last_pos($point->clone);
     }
     if (defined $z && (!defined $self->z || $z != $self->z)) {
diff --git a/xs/lib/Slic3r/XS.pm b/xs/lib/Slic3r/XS.pm
index d30f84299..42821b816 100644
--- a/xs/lib/Slic3r/XS.pm
+++ b/xs/lib/Slic3r/XS.pm
@@ -33,6 +33,11 @@ use overload
     '@{}' => sub { [ $_[0]->x, $_[0]->y ] },  #,
     'fallback' => 1;
 
+package Slic3r::Pointf::Ref;
+our @ISA = 'Slic3r::Pointf';
+
+sub DESTROY {}
+
 package Slic3r::Pointf3;
 use overload
     '@{}' => sub { [ $_[0]->x, $_[0]->y, $_[0]->z ] },  #,
@@ -226,9 +231,4 @@ use overload
     '@{}' => sub { $_[0]->arrayref },
     'fallback' => 1;
 
-package Slic3r::Config::Print::Ref;
-our @ISA = 'Slic3r::Config::Print';
-
-sub DESTROY {}
-
 1;
diff --git a/xs/src/Extruder.cpp b/xs/src/Extruder.cpp
index c7a04941f..590855cc3 100644
--- a/xs/src/Extruder.cpp
+++ b/xs/src/Extruder.cpp
@@ -24,7 +24,7 @@ Extruder::reset()
 double
 Extruder::extrude(double dE)
 {
-    if (this->use_relative_e_distances()) {
+    if (this->config->use_relative_e_distances) {
         this->E = 0;
     }
 
@@ -33,116 +33,94 @@ Extruder::extrude(double dE)
     return this->E;
 }
 
-template <typename Val, class OptType> Val
-Extruder::get_config(const char *name) const
-{
-    // TODO: figure out way to avoid static_cast to access hidden const method
-    const ConfigOption *opt = static_cast<const ConfigBase*>(this->config)
-        ->option(name);
-    return dynamic_cast<const OptType *>(opt)->get_at(this->id);
-}
-
-bool
-Extruder::use_relative_e_distances() const
-{
-    // not using get_config because use_relative_e_distances is global
-    // for all extruders
-
-    // TODO: figure out way to avoid static_cast to access hidden const method
-    const ConfigOption *opt = static_cast<const ConfigBase*>(this->config)
-        ->option("use_relative_e_distances");
-    return *static_cast<const ConfigOptionBool*>(opt);
-}
-
 Pointf
 Extruder::extruder_offset() const
 {
-    return get_config<Pointf, ConfigOptionPoints>("extruder_offset");
+    return this->config->extruder_offset.get_at(this->id);
 }
 
 double
 Extruder::nozzle_diameter() const
 {
-    return get_config<double, ConfigOptionFloats>("nozzle_diameter");
+    return this->config->nozzle_diameter.get_at(this->id);
 }
 
 double
 Extruder::filament_diameter() const
 {
-    return get_config<double, ConfigOptionFloats>("filament_diameter");
+    return this->config->filament_diameter.get_at(this->id);
 }
 
 double
 Extruder::extrusion_multiplier() const
 {
-    return get_config<double, ConfigOptionFloats>("extrusion_multiplier");
+    return this->config->extrusion_multiplier.get_at(this->id);
 }
 
 int
 Extruder::temperature() const
 {
-    return get_config<int, ConfigOptionInts>("temperature");
+    return this->config->temperature.get_at(this->id);
 }
 
 int
 Extruder::first_layer_temperature() const
 {
-    return get_config<int, ConfigOptionInts>("first_layer_temperature");
+    return this->config->first_layer_temperature.get_at(this->id);
 }
 
 double
 Extruder::retract_length() const
 {
-    return get_config<double, ConfigOptionFloats>("retract_length");
+    return this->config->retract_length.get_at(this->id);
 }
 
 double
 Extruder::retract_lift() const
 {
-    return get_config<double, ConfigOptionFloats>("retract_lift");
+    return this->config->retract_lift.get_at(this->id);
 }
 
 int
 Extruder::retract_speed() const
 {
-    return get_config<int, ConfigOptionInts>("retract_speed");
+    return this->config->retract_speed.get_at(this->id);
 }
 
 double
 Extruder::retract_restart_extra() const
 {
-    return get_config<double, ConfigOptionFloats>("retract_restart_extra");
+    return this->config->retract_restart_extra.get_at(this->id);
 }
 
 double
 Extruder::retract_before_travel() const
 {
-    return get_config<double, ConfigOptionFloats>("retract_before_travel");
+    return this->config->retract_before_travel.get_at(this->id);
 }
 
 bool
 Extruder::retract_layer_change() const
 {
-    return get_config<bool, ConfigOptionBools>("retract_layer_change");
+    return this->config->retract_layer_change.get_at(this->id);
 }
 
 double
 Extruder::retract_length_toolchange() const
 {
-    return get_config<double, ConfigOptionFloats>("retract_length_toolchange");
+    return this->config->retract_length_toolchange.get_at(this->id);
 }
 
 double
 Extruder::retract_restart_extra_toolchange() const
 {
-    return get_config<double, ConfigOptionFloats>(
-        "retract_restart_extra_toolchange");
+    return this->config->retract_restart_extra_toolchange.get_at(this->id);
 }
 
 bool
 Extruder::wipe() const
 {
-    return get_config<bool, ConfigOptionBools>("wipe");
+    return this->config->wipe.get_at(this->id);
 }
 
 
diff --git a/xs/src/Extruder.hpp b/xs/src/Extruder.hpp
index 7302e42a3..9caa38c89 100644
--- a/xs/src/Extruder.hpp
+++ b/xs/src/Extruder.hpp
@@ -14,9 +14,8 @@ class Extruder
     virtual ~Extruder() {}
     void reset();
     double extrude(double dE);
-
-
-    bool use_relative_e_distances() const;
+    
+    
     Pointf extruder_offset() const;
     double nozzle_diameter() const;
     double filament_diameter() const;
@@ -32,21 +31,14 @@ class Extruder
     double retract_length_toolchange() const;
     double retract_restart_extra_toolchange() const;
     bool wipe() const;
-
+    
     int id;
     double E;
     double absolute_E;
     double retracted;
     double restart_extra;
-
+    
     PrintConfig *config;
-
-
-    private:
-
-    // get value from a ConfigOptionVector subtype, indexed by extruder id
-    template <typename Val, class OptType>
-    Val get_config(const char *name) const;
 };
 
 }
diff --git a/xs/xsp/Extruder.xsp b/xs/xsp/Extruder.xsp
index 47b5c0fa2..d80b34d62 100644
--- a/xs/xsp/Extruder.xsp
+++ b/xs/xsp/Extruder.xsp
@@ -7,15 +7,13 @@
 
 %name{Slic3r::Extruder} class Extruder {
     Extruder(int id, PrintConfig *config);
-
     ~Extruder();
     void reset();
     double extrude(double dE);
-
+    
     int id() const
         %code%{ RETVAL = THIS->id; %};
-
-
+    
     double E() const
         %code%{ RETVAL = THIS->E; %};
     double set_E(double val) const
@@ -32,7 +30,7 @@
         %code%{ RETVAL = THIS->restart_extra; %};
     double set_restart_extra(double val) const
         %code%{ RETVAL = THIS->restart_extra = val; %};
-
+    
     Clone<Pointf> extruder_offset() const;
     double nozzle_diameter() const;
     double filament_diameter() const;