RBARNES496
02-15-2010, 09:40 PM
I was in a sheetmetal shop a while back watching one of the punch presses when i saw the scrap bin a 55 gallon drum of plugs. I bet i spent a hour getting a large cup knock-outs all sizes. then i went and bought a stepdrill/uni-bit. I drilled the holes out in my firewall to match the plugs insert/weld. I filled the whole firewall in 3-4hrs and didnt have to cut a single round plug. I am sure i am not the first to do this but hopefully it helps someone. I wish i would have known earlier.