Those are neat and I have used them laying aluminum patches on hulls, but they really on work well on joining flat sheets. Our (or at least my) door(s) have a lip that will preclude getting the centering pin into the hole.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit