Just thought I'd share...
[For 30 micron printing]
I had the crazy idea to put the projector on stilts... just change out the projector bolts with one's that are about 1 1/4 longer and add some spacers.
It's worked for me on 3 vats so far...
One footnote; when you mount the projector pay close attention to your shot... level projector (with a level) center the shot, and use a metal rod to align where you would normally put the slip pin.