Fifty of 'em? That’s a big commitment to yellow!
I have lots of 1900H clone knobs on my Eurorack (well, not fifty. Lots compared to any other knobs though.) It’s rare you can get away with anything bigger in Eurorack, that’s what bugs me about that format.
Definitely gotta watch the shaft sizes, 6 mm knobs for 6.35 mm shafts is a problem. Alpha does make 6 mm shaft pots though.
6.35 mm knobs for 6 mm shafts is a solvable problem.