hi,

i probably wouldnt risk it, roys probably your best bet to ask, though everyone has different opinions on how much extra voltage their kit will take. Usually its better to play safe unless you plan on liquid cooling the board :D.. I've got a system 1 v2 board and as you say its got everything you'd need for your setup including the 70v pre regulator and 4 stepper outputs(1 slaved) you may well have to buy the plug in module for your spindle if you want full control of it. its pretty well priced. i'd go for that if i were you.