Dimpled firewall holes - didn't have a #30 size pop rivet dimple set, so I scratched the noggin and hefted the beasty DRDT-2 dimpler (heavy steel for you non-builders) and had Austin do the squeeze. Then I fabricated and fit the 721-C bracket, riveted it to the deck, then riveted the deck rail to the longeron.
How to use a heavy dimpler for hard to reach firewall holes
Riveted the front F721 deck piece
Tricky bracket to drill and rivet in place due to acute angle (not appreciated in photo)
