I just picked up a set of the spring straps and I really like them; however the buckle-to-post connection isn't secure at all and the buckles will slip off the posts as soon as I remove the fins (using Apollo Bio-fins). The pin in the buckle doesn't seem to be low enough or close enough for a secure fit against the base of the post; I'm wondering if anyone has a suggestion as to a method for fixing this without having to get access to a machine shop....