Disassembled the firewall and did all the de-burring. Dimpled the stainless steel firewall to accept the #3 and #4 frush rivets. Primered all the parts and then cleco'd the assembly back together. Used my "Back Rivet Plate" to do all the flush riveting. Left the Firewall Recess" open as per the plans to provide easier access for other construction.
