I have 3 Bridgeports all retrofitted wth new electronics and running on Mach 3. I an now looking at getting rid of the noisy/clumsy vari-drives and going with a VFD. Probably going to go with a Hitachi with Modbus capability to control from Mach 3. I would like to get ideas on how some of you have done away with the vari-drives? What type of pulleys and belts? I have read mention of v-belts as well as cam belts. And where did you purchase your parts and what did you fabricate? Some pics and or ideas would be greatly appreciated.