Many thanks to you all, RCU at its best. I am not planning to weld titanium TO stainless just each metal to itself so I'll try the system Wren is using, thank you Sara. Not going into the tailpile business just making up a couple of dummy gas turbine starter exhausts for my AW Hawks. (using some old tailpipe stainless so they look realistically burned)

The Aerofly looks very good and has a BobCat so thats what it will be !

Again, my sincere thanks to you all.

David Gladwin.