Sounds familiar...I followed the same route myself and also used those stick on transfers for IC footprints. I may be better building my own 3018 style machine with a high speed spindle than trying to modify my existing machine with a high speed spindle. It would be nicer making my PCB in the warm house instead of a trip out to access the big CNC in the garrage. I have more project ideas than, sense, time or money.......