I used these a lot on the Sierra. Storage when not in use is in one of those magnetic parts trays. Having a decent magnet on a bit of net-curtain spring wire helps retrieve lost pins.
Also have a look on GazTube for Fitzee Cut and Butt method. Works well enough.
Find many great new & used options and get the best deals for Sheet Metal Butt Welding Clamps Fasteners Fastener Intergrips Panel Lock Grip at the best online prices at eBay! Free delivery for many products.