diff --git a/Makefile b/Makefile
index f24d60a..c5dcade 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ all: GPX/build
 		make -C $$dir $@; \
 		echo "Exiting $$dir"; \
 	done
-	python setup.py develop
+	python3 setup.py develop
 
 GPX/build: GPX/configure
 	mkdir -p GPX/build
diff --git a/octoprint_GPX/__init__.py b/octoprint_GPX/__init__.py
index 4ff8f51..fbf317d 100644
--- a/octoprint_GPX/__init__.py
+++ b/octoprint_GPX/__init__.py
@@ -399,7 +399,7 @@ def batcheeprom(self, *args, **kwargs):
 			try:
 				response[eepromid] = gpx.read_eeprom(eepromid)
 			except ValueError:
-				SELF._LOGGER.WARN("UNKNOWN EEPROM id %s" % eepromid)
+				self._logger.warn("UNKNOWN EEPROM id %s" % eepromid)
 			except gpx.UnknownFirmware:
 				self._logger.warn("Unrecognized firmware flavor or version.")
 				return make_response("Unrecognize firmware flavor or version", 400)
diff --git a/octoprint_GPX/static/js/gpx.js b/octoprint_GPX/static/js/gpx.js
index 02cc76a..08df28a 100644
--- a/octoprint_GPX/static/js/gpx.js
+++ b/octoprint_GPX/static/js/gpx.js
@@ -250,15 +250,15 @@ $(function() {
                     ko.mapping.fromJS(response, self.eeprom);
                     bit = 0x1;
                     for (axis in self.axes) {
-                        self.steps_per_mm[axis](self.eeprom["AXIS_STEPS_PER_MM_" + axis]() / 1000000.0);
+                        self.steps_per_mm[axis](self.eeprom["AXIS_STEPS_PER_MM_" + axis]());
                         self.home[axis](self.eeprom["AXIS_HOME_POSITIONS_STEPS_" + axis]() / self.steps_per_mm[axis]());
                         self.invert_axis[axis](!!(self.eeprom.AXIS_INVERSION() & bit));
                         self.invert_endstop[axis](!!(self.eeprom.ENDSTOP_INVERSION() & bit));
                         bit <<= 1;
                     }
                     self.z_hold(!(self.eeprom.AXIS_INVERSION() & 0x80));
-                    self.jkn_k(self.eeprom.JKN_ADVANCE_K() / 100000.0);
-                    self.jkn_k2(self.eeprom.JKN_ADVANCE_K2() / 100000.0);
+                    self.jkn_k(self.eeprom.JKN_ADVANCE_K());
+                    self.jkn_k2(self.eeprom.JKN_ADVANCE_K2());
                     self.toolhead_offset.X(self.eeprom.TOOLHEAD_OFFSET_SETTINGS_X() /self.steps_per_mm.X());
                     self.toolhead_offset.Y(self.eeprom.TOOLHEAD_OFFSET_SETTINGS_Y() /self.steps_per_mm.Y());
                     self.max_zdelta(self.eeprom.ALEVEL_MAX_ZDELTA() / self.steps_per_mm.Z());
@@ -280,6 +280,7 @@ $(function() {
             var endstop_inversion = self.eeprom.ENDSTOP_INVERSION() & 0xe0;
             for (axis in self.axes) {
                 self.eeprom["AXIS_HOME_POSITIONS_STEPS_" + axis]((self.home[axis]() * self.steps_per_mm[axis]()) | 0);
+                self.eeprom["AXIS_STEPS_PER_MM_" + axis](self.steps_per_mm[axis]());
                 if (self.invert_axis[axis]()) axis_inversion |= bit;
                 if (self.invert_endstop[axis]()) endstop_inversion |= bit;
                 bit <<= 1;
@@ -287,8 +288,8 @@ $(function() {
             if (!self.z_hold()) axis_inversion |= 0x80;
             self.eeprom.AXIS_INVERSION(axis_inversion);
             self.eeprom.ENDSTOP_INVERSION(endstop_inversion);
-            self.eeprom.JKN_ADVANCE_K((self.jkn_k() * 100000) | 0);
-            self.eeprom.JKN_ADVANCE_K2((self.jkn_k2() * 100000) | 0);
+            self.eeprom.JKN_ADVANCE_K(self.jkn_k());
+            self.eeprom.JKN_ADVANCE_K2(self.jkn_k2());
             self.eeprom.TOOLHEAD_OFFSET_SETTINGS_X((self.toolhead_offset.X() * self.steps_per_mm.X()) | 0);
             self.eeprom.TOOLHEAD_OFFSET_SETTINGS_Y((self.toolhead_offset.Y() * self.steps_per_mm.Y()) | 0);
             self.eeprom.ALEVEL_MAX_ZDELTA((self.max_zdelta() * self.steps_per_mm.Z()) | 0);
diff --git a/octoprint_GPX/templates/GPX_settings.jinja2 b/octoprint_GPX/templates/GPX_settings.jinja2
index df134f4..220a7b7 100644
--- a/octoprint_GPX/templates/GPX_settings.jinja2
+++ b/octoprint_GPX/templates/GPX_settings.jinja2
@@ -295,6 +295,9 @@
                     {% set axis_name = axis + ' axis' + gpx_axis_suffix(axis) %}
                     {{ gpx_checkbox('invert_axis.' + axis, _('Invert {}').format(axis_name), _('If an axis is moving in the wrong direction, toggle that axis')) }}
                     {% endfor %}
+                    {% for axis in axes %}
+                    {{ gpx_spinner_unit('steps_per_mm.' + axis, _('steps/mm'), 0.000001, 0, 0, _('{} Steps per mm').format(axis), _('The number of steps per mm')) }}
+                    {% endfor %}
                 </div>
             </div>
             <div id="gpx_eeprom_endstops" class="tab-pane">