- At the lower firewall, finished drilling the pilot holes into the aluminum frame.
- The holes along the bottom of the stainless steel firewall is another matter altogether. I haven't got any cobalt bits yet. My current 3/32" bits just will not go through, even with cutting fluid. In photo #2 that "dent" was a 3/32" bit after 5 minutes of work with cutting fluid and SLOW drill speed.
- So I went on to cutting out the upper firewall pieces F17-03 and -05. I still have to make the center cutout in the larger pieces.
Upper firewall pieces
Drilling thru the stainless is a bear! The dent at the right is 5 minutes of work with no success.
