Thanks for that Danny.

Right I'm still struggling with the peculiarities of this stuff. I've created a loop and I want to sweep a cirle around it and then union jointhe result from the shell.

Unfortunately when I try sweeping the circle it creates 2 half sections!? Why is this? I don't understand it? It creates a tiny gap between the 2 and it seems impossable to join them up again, using the join command doesn't work? Is there no manual weld or something like that?

Beause it making 2 sections when I come to union join the tube with the shell its going nuts and even more so when I try to fillet it after!

Could someone explain to me what's going wrong? I just don't understand why it seems so picky!?