I am starting a build of a CRP4896. I have the Nema23 motors and the Gecko G540 electronics from CncRouterParts and have them working. I have Mach3 and VcarvePro as well. I purchased the 2.2KW spindle and Huanyang CFD from BuildYourCNC – not wired or tested yet. I want to control the spindle motor from Mach3 )on/off and speed) but cannot find any definitive information on how to do it. Does anyone here have this configuration working with the Huanyang and Mach3?