I built it as a single, but I'm not entirely done with it yet. For one thing it came out a little oblong because I overlapped too far. I have to take it back apart and make the overlap about 3/8" according to Eddie. I just ordered some safety wire from Todd so I'll aluminum foil the pipe and safety wire it later this week. (I always used nichrome wire for safety wire on fuel tubing, but thought this pipe should have something more heavy duty than nichrome).

It's got I believe (6) 6-32 half inch screws down the line in it over a ( I believe it was 32 inches long).