It is time to think about the VAT again.
Consider the following:
the VAT is 125mm x 100mm x 20mm high. I have spacing for VAT sides that are up to 28mm high.
If I fill the VAT with 4mm resin it gives me 50 cc. If I lower glass base in the resin it will rise to at least 8~10mm. If I tilt the tray 5mm down I will be at a safe level of 15~17mm, but it limits me to have to fill the VAT with more resin midway if I'm printing a solid object. I will either have to rebuild the VAT with higher walls or I will use the "wait and see" approach.