Well, having done the calcs on my mill, and measured the actual friction coefficient with a digital spring gauge, I know the likely motor is going to be in the order of 3Nm to achieve 1300mm/min cutting and 2500mm/min rapids. If I hadn't measured it then the estimated friction coeff of 1.1 would have suggested a 4Nm motor. I'm working on 36v @ 4A as I have a 36v, 12A PSU to hand.

The point here is that every mill is different. You need to weigh the table and measure the friction coefficients to avoid overegging the solution. I am not fussed about cutting speeds as long as they are reasonable... its still going to be faster/more accurate than I can do it by hand and since I dont have suds or one-shot oilers I'm going to have to be there to spray/oil as it runs.... Its not going to be working hard enough to justify doing those mods...yet...