My original Z axis code was off by 20micron, oops! That is A LOT! And I think why I destroyed my vat and possibly why I was smushing the print. My new updated code is off by 1 micron; better, and maybe within a margin of error of my measuring tools. I was basically moving up and down 1cm at a time and measuring how much it really moved. I need to order material to redo my vat and then I'll probably try another print.