I decided it unnecessary to make an instructable for this so ill just explain it. As a alternative to my large wallet i made a money clip out of ductape (gorilla tape :)), credit card and small neodymium magnets. The credit card was cut and built inside for support. The magnets i scavenge from a leather ipod case. they are powerful enough to hold 15 bills folded in half. The are placed in sets of 2 at the ends.