I thought I would drill the remaining holes thru the firewall and mount the fuel pump doubler. But after measuring and marking the holes and making the doubler I decided I could wait to rivet this. I will wait until just before rivetting on the firewall.
I did drill at pilot size the one hole that will interfer with the fuel pump doubler so I could mark the cut away on the doubler. But I stopped here. More on this firewall later.
