As I am a bit stuck with work in the cabin, I decide to take a look at the firewall forward. I begin by working on the battery box. Eight holes have to be drilled, here is a picture after three are done. On the foreground, the bar that will hokd the battery in the box (the non aligned holes in the middle of the bar are my personal touch of the day!!!!!)



Now the drilling is dond and the side angles are match drilled too.