Hi Dave, you are right about the joints we just drop a coach bolt into a pre drilled hole.
The plastic is a bit more problematic in that we get it through someone at the BRCA in a sheet then you have to cut it up. Its a long time since we got any but if you contact anyone on the BRCA committee I am sure they will help. It is good stuff and we get only rare breakages.
Regards
Eric Dunn
Chairman
RVRCCC