Hi, Many thanks for all your suggestions. I will try Aquasure, I had'nt heard of that. I take the point about having to clamp very securely. Sage I was just using screws I found in the toolbox!! so probably not the right thing!
In the meantime I'll just tape them up till I get some Aquasure.
Thanks again for all your help.
P.S. I got hold of some Peccary and will try and post a pic. of one of my efforts with it shortly.
Bill