I’m very glad to see that a laser is certainly a promising option!
@vintagefilm I must have missed your post in my search. I’m sorry about that! Great to see that it works, though. I wonder what is the key difference to my test setup that makes yours work. It doesn’t seem to be the wavelength. I assume there is a difference, though. Buying it new, your laser is certainly more expensive than mine (according to a quick Google search 300€+ vs. 10€).
@Matteo_Ricchetti your scans look great, certainly very stable! Using a laser would allow me to do the sprocket registration in the same place a projector or camera would place its claw, which I was in fact hoping would give me better out-of-the-box stability. Would you mind explaining how your sprocket registration works?