Here was my prototype design, TBH heat rises, so not much is transferred as I ran the pipes to the side and not over the engine. But I wasn't happy with it, so I instead did use exhaust heat rap, which is not to expensive for giant reel with some jubilees.
Here's the beading tool, not cheap about £90 off ebay, yet since I've moved I cannot find it, extremely pissed about it, you put it in a vice and slowly turn the tube to press it out.
