Pdm, I think I'll put some ply in just for extra support as you said. Will work on the plane tonight again. Yes, I have kept the thrust angle in my mind, but wasn't sure where it originally was. I used the "old" glue marks as references. The thrust angle seems to be fine, but only flying it will really tell. The firewall is not the straightest thing in the world anymore - the ideal would have been to cut a new one. But since it has been a bit crooked after the last crash, it doesn't bother me to much since I know it holds up. I will however thoroughly check it before taking it up for the real test.