Should 3D print a thing that has grooves at 30, 45, and 60° on it and a long flat side that can sit where the wood sits on the chop saw, then you can (with the saw off) pull the blade down to align and tighten it without needing to guess or measure or anything.
Bonus points if it’s pretty tall/deep slits so you can verify that its 90° from the bottom surface too