Still waiting for some parts for wings. I pick up a smaller part to work with. The firewall. After primer firewall parts 6-B-6-2L, -2R and -2C they were riveted together. I used 4mm stainless steel rivets. There are a lot of angles, channels and brackets. Tomorrow I start to find out wich areas that need primer. And in wich order to rivet, always a risk to do wrong.