How thick is the ends of the strap? If the leather is too thick. It's going to rub
In order to use curved spring bars (I don't trust them as less strength than straight). You need straps with curved ends
I saw metal end links you attach to the leather straps which look similar to Rolex bracelet end links
I thought Rolex made them, but not?
Search on Rolex metal end links for leather straps Don't ask me which are the best. Don't own a Rolex
DON