I'll add that while both of my tanks were out I had the fuel vent line re-positioned higher in the fill stalk. It was the mechanic's impression that it was too low and could therefore could easily flood the charcoal canister; as my canister was definitely previously flooded with gas.
My crack fix was tank removal, drain and clean, and then properly weld in reinforced brackets. Although only one tank had a crack I had both done while it was all apart.
I'm not sure about gluing reinforcing parts to an already cracked tank but it seems like that is a reasonable preventative strategy before cracks appear. I'd wonder how the gas vs. glue will hold over the long term.
I'll speculate that this is just another Morgan 'feature' meant to increase the excitement of motoring in an M3W; a chance to literally 'go out in a blaze of glory'!
