diff --git a/arduino/startracker.ino b/arduino/startracker.ino
index abe1eb3..3549cb7 100644
--- a/arduino/startracker.ino
+++ b/arduino/startracker.ino
@@ -59,8 +59,11 @@ static const bool stepper_direction = true;
 //ratio between the large gear and the small one=0.2549
 
 // Science here !
-static const float nr_teeth_small = 11.0;
-static const float nr_teeth_big = 53.0;
+#include "teeth_config.h"
+
+static const float nr_teeth_small = CONFIG_TEETH_SMALL; // 13.0
+static const float nr_teeth_big = CONFIG_TEETH_BIG; // 51.0
+
 static const float axis_hinge_dist_mm = 200;
 
 // Use immediate value. Using symbolic values leads to incorrect value.
@@ -80,10 +83,10 @@ static struct rot_state_t {
   float stepper_gear_rot_rad = 0;
 } rot_state;
 
-#define DUMP(v) do { \
-  Serial.print(#v " "); \
-  Serial.println(v, 10);			\
-} while(0)
+#define DUMP(v) do {				\
+    Serial.print(#v " ");			\
+    Serial.println(v, 10);			\
+  } while(0)
 
 static void debug_long(rot_state_t *s){
   const unsigned long ellapsed_in_sec = s->elapsed_time_millis/1000;
diff --git a/arduino/teeth_config.h b/arduino/teeth_config.h
new file mode 100644
index 0000000..181de27
--- /dev/null
+++ b/arduino/teeth_config.h
@@ -0,0 +1,4 @@
+#pragma once
+#define CONFIG_TEETH_SMALL 13.0
+#define CONFIG_TEETH_BIG 51.0
+
diff --git a/sync_values.sh b/sync_values.sh
new file mode 100755
index 0000000..85c9682
--- /dev/null
+++ b/sync_values.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+SCAD_FILE=3d_models/gears.scad
+CONFIG_GEN=arduino/teeth_config.h
+
+gear1_teeth=$(grep 'gear1_teeth ='  < $SCAD_FILE | sed -e 's/gear1_teeth = \(.*\);/\1/g')
+gear2_teeth=$(grep 'gear2_teeth ='  < $SCAD_FILE | sed -e 's/gear2_teeth = \(.*\);/\1/g')
+
+echo $gear2_teeth $gear1_teeth
+
+TMPL="#pragma once\n\
+#define CONFIG_TEETH_SMALL 13.0\n\
+#define CONFIG_TEETH_BIG 51.0\n\
+"
+
+echo -e $TMPL > $CONFIG_GEN