Well we use an Eckold Kraftformer from Belgium. Once we have the cut lines laid out and trimmed to what we want. We use the good old hammer and dollie to form 45 Degrees of the radius with a bent section of tubing and and hammer and dollie. The shrinker helps to make it go faster by just lightly shrinking the end to help pull it over. As the edge comes over you need it to shorten it to help it hold its shape. Then we do the same thing to the to the top section. Once we have to halves we over lap the pices and cleco them togther and scribe and cut both pieces to have a perfect fit. Then we begin tacking them togther with the tig. If you tig weld them you can get the best results.
Anybody in their garage should be able to build these with the table mounted Lancaster shrinker/strechers, Slight curve hammer and dollie. We sometimes roll a section of tubing to the radius just to give us a longer section to beat against to get it nice and round. 2 tubs usually take 40-50 hours depending on complexity.
Thanks guys, if you have anymore questions let me know.
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