Summary

Remixed for use with a 500mW Laser from AliExpress.....
planed to use it with CNC Shield V4
and the following things:
3314197
3314168

you have to use the Y-Base from the original thing.

ATTENTION !!!
It´s necessary to change the GRBL settings for use with the shield. The layout of the circuit isn´t correct.
so you have to change the ports in grbl-master\cpu_map\cpu_map_atmega328p.h
in this file you have to switch ports from DIRECTION and PULSE of each axis

ALSO spindle on/off with PWM is accesible over Z+ Endstop cause of switching the PWM port in GRBL Versions....