How much did the bottom resemble a standard tank, in terms of stiffening creases, etc.?
You have to wonder how they decided where to put the mounting lugs and oil filler neck opening. I can understand that they didn't want to buy a UFM on Ebay, but working with someone in the UK or elsewhere to get an accurate jig would enable tanks that fit and positive recommendations and taking over the Vin tank world monopoly! Sort of a Dr. Evil For Good.