diff --git a/README.md b/README.md
index 889209a..02d983f 100644
--- a/README.md
+++ b/README.md
@@ -10,25 +10,25 @@ Usage notes:
   If it doesn't, try installing VCOM_lib/usbser.inf.
 * This doesn't pass the sdcard to the host. Once installed you need to use a micro sdcard adaptor to replace or change it.
 * Only tested with lasers with PWM. Non-PWM spindle control not ported.
-* This special version supports setting PWM frequency by $33. Default is 5000 Hz. Pin can only be changes in config.h.
-  * Pin 2.5
-  * 5 kHz
-  * PWM off value: 0%
-  * Mimimum PWM value: 0%
-  * Maximum PWM value: 100%
 * These are defaults for easy-to-change config values.
+  * WPos enabled for LaserWeb compatability ($10=0)
   * Maximum S value: 1000.0 ($30)
   * Minimum S value: 0.0 ($31)
   * Laser mode: 1 ($32)
-  * Laser PWM frequency: 5000 ($33)
+* New configuration settings
+  * $33 is PWM frequency in Hz
+  * $34 is PWM off value in %
+  * $35 is PWM min value in %
+  * $36 is PWM max value in %
+  * $140 is X current (amps)
+  * $141 is Y current (amps)
+  * $142 is Z current (amps)
+  * Currents default to 0.0 amps to avoid burning out your motors/drivers
+  * Your motors will likely stall if you don't set these!
+
 * Hard limits not yet ported
 * Control inputs not yet ported (e.g. Cycle Start and Safety Door switches)
 
-New configuration settings
-* $33 is PWM frequency in Hz
-* $140, $141, $142 are X, Y, Z current (amps)
-* Default to 0.0 A to avoid burning out your motors
-* Your motors will likely stall if you don't set these!
 
 Build notes:
 * Include ```make``` and the ```arm-none-eabi-*``` tools in your path.
diff --git a/grbl/report.c b/grbl/report.c
index f748d6e..0c131fd 100644
--- a/grbl/report.c
+++ b/grbl/report.c
@@ -214,7 +214,10 @@ void report_grbl_settings() {
   #else
     report_util_uint8_setting(32,0);
   #endif
-  report_util_uint32_setting(33,settings.spindle_pwm_freq);
+  report_util_float_setting(33,settings.spindle_pwm_freq,N_DECIMAL_SETTINGVALUE);
+  report_util_float_setting(34,settings.spindle_pwm_off_value,N_DECIMAL_SETTINGVALUE);
+  report_util_float_setting(35,settings.spindle_pwm_min_value,N_DECIMAL_SETTINGVALUE);
+  report_util_float_setting(36,settings.spindle_pwm_max_value,N_DECIMAL_SETTINGVALUE);
   // Print axis settings
   uint8_t idx, set_idx;
   uint8_t val = AXIS_SETTINGS_START_VAL;
diff --git a/grbl/settings.c b/grbl/settings.c
index f42015c..644debb 100644
--- a/grbl/settings.c
+++ b/grbl/settings.c
@@ -337,6 +337,9 @@ uint8_t settings_store_global_setting(uint8_t parameter, float value) {
         #endif
         break;
       case 33: settings.spindle_pwm_freq = value; spindle_init(); break; // Re-initialize spindle pwm calibration
+      case 34: settings.spindle_pwm_off_value = value; spindle_init(); break; // Re-initialize spindle pwm calibration
+      case 35: settings.spindle_pwm_min_value = value; spindle_init(); break; // Re-initialize spindle pwm calibration
+      case 36: settings.spindle_pwm_max_value = value; spindle_init(); break; // Re-initialize spindle pwm calibration
       default:
         return(STATUS_INVALID_STATEMENT);
     }
diff --git a/grbl/settings.h b/grbl/settings.h
index e6e5abe..71e9aa0 100644
--- a/grbl/settings.h
+++ b/grbl/settings.h
@@ -92,10 +92,10 @@ typedef struct {
   float junction_deviation;
   float arc_tolerance;
 
-  float spindle_pwm_freq;
+  float spindle_pwm_freq;      // Hz
   float spindle_pwm_off_value; // Percent
   float spindle_pwm_min_value; // Percent
-  float spindle_pwm_max_value; // Percent  
+  float spindle_pwm_max_value; // Percent
   float rpm_max;
   float rpm_min;
 
diff --git a/grbl/spindle_control.c b/grbl/spindle_control.c
index 74a589f..b3e203f 100644
--- a/grbl/spindle_control.c
+++ b/grbl/spindle_control.c
@@ -142,21 +142,21 @@ void spindle_stop()
     rpm *= (0.010*sys.spindle_speed_ovr); // Scale by spindle speed override value.
     if (rpm <= 0) {
       sys.spindle_speed = 0;
-      pwm_value = spindle_pwm_off_value;    //SPINDLE_PWM_OFF_VALUE
+      pwm_value = spindle_pwm_off_value;
     }
     else if (rpm <= settings.rpm_min) {
       sys.spindle_speed = settings.rpm_min;
-      pwm_value = spindle_pwm_min_value;    //SPINDLE_PWM_MIN_VALUE
+      pwm_value = spindle_pwm_min_value;
     }
     else if (rpm >= settings.rpm_max) {
       sys.spindle_speed = settings.rpm_max;
-      pwm_value = spindle_pwm_max_value - 1;    //SPINDLE_PWM_MAX_VALUE
+      pwm_value = spindle_pwm_max_value - 1;
     }
     else {
       sys.spindle_speed = rpm;
-      pwm_value = floor((rpm - settings.rpm_min) * pwm_gradient) + spindle_pwm_min_value;   //SPINDLE_PWM_MIN_VALUE
-      if(pwm_value >= spindle_pwm_max_value)    //SPINDLE_PWM_MAX_VALUE
-        pwm_value = spindle_pwm_max_value - 1;  //SPINDLE_PWM_MAX_VALUE
+      pwm_value = floor((rpm - settings.rpm_min) * pwm_gradient) + spindle_pwm_min_value;
+      if(pwm_value >= spindle_pwm_max_value)
+        pwm_value = spindle_pwm_max_value - 1;
     }
     return(pwm_value);
   }
diff --git a/grbl/spindle_control.h b/grbl/spindle_control.h
index 302e2db..06c028f 100644
--- a/grbl/spindle_control.h
+++ b/grbl/spindle_control.h
@@ -40,6 +40,10 @@ uint8_t spindle_get_state();
 // Immediately sets spindle running state with direction and spindle rpm via PWM, if enabled.
 // Called by spindle_sync() after sync and parking motion/spindle stop override during restore.
 #ifdef VARIABLE_SPINDLE
+  extern float spindle_pwm_period;
+  extern float spindle_pwm_off_value;
+  extern float spindle_pwm_min_value;
+  extern float spindle_pwm_max_value;
 
   // Called by g-code parser when setting spindle state and requires a buffer sync.
   void spindle_sync(uint8_t state, float rpm);