I currently have a PCPPS breakout board from http://www.diycnc.co.uk which has a charge pump (works OK with LinuxCNC) but it is NOT opto-isolated and doesn't have a spindle control. The above website can supply a separate spindle control board at a cost of £25 - £30, so total cost is around £45 for a B.O.B. and spindle controller.So http://www.ebay.co.uk/itm/251652222037 (as suggested above) seems like a good alternative. At half the price, I can afford to buy 2 and keep one as a backup for replacement or another project.Anyone using the above board in their project? Reliable?