[FoxCNC1]

Yes just set your stock material using + or - numbers to adjust how much over or under to cut....

But correct me if I am wrong, the tolerance values basically control how much material to leave (extra) as opposed to how much extra to take out.
In other words, unlike aspire, in rhinocam you can only go - xx.xx and not +/- xx.xx. You can only go in one direction (unless I am missing something) and that is what I am asking.

So in the example of the hole, if I draw it at 0.25" and the machine cuts it at 0.24" my solution has been to draw the circle at 0.26" so that my machine cuts it at the correct size.
if I were to use the tolerance parameter and input the value 0.01", the machine will cut a smaller hole = 0.23" in my case. Furthermore, the parameter will not allow my to input -0.01" which I would think would cut the whole bigger.

Aside from this, What is a spring pass? is it a finish pass?