Forked from https://github.com/damieng/setledsmac and based on the advice of @gilsonolegario, this tool will let you toggle the numlock key on the CoolerMaster ...
Numlock ON changes the behaviour of the "normal" arrow keys while using RDP. That's wrong. It should keep sending 37, 38, 39, 40 for the arrow keys instead of 98, 100 ...