The only way the sporran will kill your credit card is by opening to let you pay for the next kilt.
Tom I had the same problem with the push studs. Here's a design I came up with on the sporran I made a while back. It's silver and ebony but any workable metal should do. It's quite weighted and never comes open when i don't want it too and is very easy to open when I do.
Erin.


and riveted onto the leather.