Here is my latest mod. I made a LED light ring. I had cut the vacuum shoe to fit the inner circle. It's all SMD. I powered the LEDs with 14.5V that I use to drive my outrunner spindle (it's in another thread from way before). I cut the outlines of the ring with a 1/16 bit. The traces I cut with 20° bit that I bought on ebay form China. I had made a 'bed' for the PCB board to get a near true cut as possible. Still not perfect but it is only 2 or 3 thou out.