The Nickel material alloyed into Stainless Steel is very gummy and sticks to the cutting tool. Causing it to overheat in addition to the hardness of the alloy. Normally you would adjust the speed of the cutter, but you cant do this on a key machine. Or can you?
Why not just make the minimum cuts with your duplicator to get your spacing then use a file and your dial caliper to get the depths close, then clean up the filed cuts with your Ti faced, or Carbide cutting wheel? How many do you have to cut anyway?
If it is a dozen or more, you may have not have found a good bargain after all. Time = Money.