Now that the hole has been cut for the filter/gascolator safety button has been drilled. I can re-install the safety button in the unit (Mock-ups with the unit are really difficult with that valve button installed so I removed it).
I opened the mounting holes from 3/32" to #28 for the #6 screws. Then I started in on dimpling the rivet holes. Wow...I didn't anticipate how difficult the access is in this area. I just barely managed to get my pneumatic squeezer in that 2 1/2" opening. I used the squeezer to dimple all the holes I could.
