Ah cool, you found it. I also ended up making a video of myself doing it as part of a build video series that I did in Kudo3D’s office with a new unassembled printer.
Jens is much better at the technique than I. What took him about 5 minutes total took me about double the time. In my case, I had to fiddle with adjusting the projector height 3 or 4 times before I got it within range of the adjustment knobs for 50 micron XY. Still, while the re-adjusting seemed annoying at the time, in net it didn’t really take that long. The video I took of Jens shows the adjustments from the side, the Kudo3D video mainly focuses on what the process looks from the image in the vat and is listed in part 7 of the Downloads – Video page: