Went to Carlisle yesterday to get some JB Weld. Stockist was shut. So down to B&Q and I found a two tube epoxy adhesive similar to Araldite.
Back home and back of tank given a good clean and a wipe with white spirit. Followed by a good smear of adhesive and then insulating tape over that. It was then left over night.
The tank was refitted this morning and filled with petrol. No immediate sign of leakage, so I started the engine. After half an hour of continuos running all still ok.
While it was running I had a bit of a play. Throwing rags, bits of paper, coffee jar lids underneath it. I know one thing, it has plenty of umph.