Very interesting, I’d not seen one of those Godox AD100 flash units before. It looks like you’ve adapted a Durst B&W enlarger (6x9?) so presumably the flash just fires into the same mirrored mixing chamber perhaps with some extra diffusion. The specification says that it has manual settings from 1/256 to full power in 1/3 or 1/10 stop intervals which sounds great. Is the 1.8W LED modelling light bright enough for focusing?
You could also post this in the 'Let’s see your DSLR scanning setup thread: