I have had a go, it is now setting.
While I was waiting, I started work on JPzr 38(t) number two. This is to be a very late model (in primer).
All went well until it came to the exhaust, I managed to dislodge part B38, the end of the exhaust. Theoretically I should have a spare from the first one I built. Can I find that sprue? No. I found sprue C, but no sprue B.
So I have used some tube and rod, and will make it a field repair with a wrap of asbestos tape.