#if defined(DOOR_PIN) && DOOR_PIN > -1

#ifndef CONFIGURATION_H

#ifndef CONFIGURATION_H

#if DUAL_X_AXIS

#if FAN_PIN >- 1 && FEATURE_FAN_CONTROL

#ifndef CONFIGURATION_H

#ifndef CONFIGURATION_H

for general solution starts using many if/#if cases. One of the reasons I started with V2 as this system has proven to be too unflexible for the raising need of special solutions.

In hindsight I think a simple #ifdefine in conditions., with a simple switch statement or ifthenelse in extruder  would solve the problem for 90% of the applications the input to PWM_POS[] is either 

Search for  #if FAN_BOARD_PIN > -1

#ifndef CONFIGURATION_H

In hindsight I think a simple #ifdefine in conditions., with a simple switch statement or ifthenelse in extruder  would solve the problem for 90% of the applications the input to PWM_POS[] is either 

#if CNC_DIRECTION_PIN > -1

      #if CNC_ENABLE_PIN > -1

      #if CNC_ENABLE_PIN > -1

#if DISTORTION_CORRECTION

#ifndef CONFIGURATION_H

#ifndef CONFIGURATION_H

#if ENABLE_SOFTWARE_SPI_CLASS

#ifndef CONFIGURATION_H