Newbie looking at 6040 (China CNC) for polypropylene 15mm sheet

[JOGARA]

Having some trouble with Fusion and I have no idea what is going wrong.

For some reason my heights are all over the place and is taking away too much stock on the Z.

Here is part of my case, in RED is what it is meant to be, and in BLUE is what I am getting (using my cheap caliper but it is pretty close to accurate).



I am using 3D adaptive clearing for the inside of the case, I set the bottom of the operation on the face of my part at the bottom. This is 2.5mm above the bottom of the stock (I have just switched to +2.5mm bottom stock instead of face selection). I then have another 3D adaptive to clear out the holes at the bottom of the case (I do this because I leave stock and then clean it up using a 3mm carbide).




Both operations are the same, just different heights and stock to leave.

(All my heights are .0mm or .5mm I don't have any heights that are .1mm other than telling it to go 0.2mm lower than the stock bottom for clearance reasons later in the setup)

Any ideas?