The “collimation” procedure sucks, but it’s not root canal. It’s a PITA, for sure, but I find the best way is to use a complex reticle, like a T3 or other Christmas tree, pop off a shot, use the thermal impact hole, “measure” the gross X/Y shift, move the screen to approximate the shift, then finish walking it in with another 5-6 rounds. They sucky part is, if you intend to use the digital zoom feature — which I highly recommend — you’ll need to do it for each zoom factor — 1x, 2x, 4x 6x.
Rinse and repeat for each rifle.
It took me >1 hour and ~50-60 rounds to get my first rifle dialed-in (a KAC SR-30 9.5” 300BLK).
I think I can improve on that now that I’ve done it once. I didn’t have to collimate 1x on my LMT AR or on the SCAR-20, but both have monolithic rails, so that could be why.