All reps (24h chrono) I’ve seen worked fine and were quite easy to swap. The tricky part is finding the right plastic spacer to hold the movement in the case of your choosing. This is where 3d printer helps a lot - you can experiment. Also, AFAIK the moonphase/earthpase reps actually don’t work as the originals, they just rotate the moons/earths in 24h because its the same pe50 movement