Well, since you seem to be rejecting the idea of switching to a lobster clasp, I guess my advice would be to work with your jeweler on obtaining a sturdier and user-friendly box clasp. There are lots of different kinds of box clasps and the jeweler should be able to show you some to choose from, and then give you a lesson on how to operate the clasp correctly. It just seems like a huge expense to transform the bracelet into a bangle. I hope you can find a workable solution.