Hi Burr, over here when I do the boolean and then cut it in half, I seem to get the same size readout for each half in MoI, here's with the top half selected:



And here's with the bottom half selected:



Seems to be showing the bounding sizes as equal as you would expect - where is it that you're seeing the sizes as different?

If it's in your other program maybe you're running into that kind of odd UI issue where the particular diagnostic readout adds some +/- tolerance value to the actual object size, I think you've run into that before in your CAM program if I remember right?

- Michael