I finished the stainless steel firewall last night. No problems but I did have to call the mother ship (Vans) to ask about the rivet orientation on the fuel pump doubler. All the other rivets have the smooth side forward to make for an easy to clean firewall except for the fuel pump doubler. Spoke to Ken Kreuger and he set me straight. I back riveted almost all of the rivets using my 3/4 inch thick plate which was the perfect size to offset the forward flange of the firewall and allowed the skin to sit flat. Now, on to the bulkheads.