Tank Sealant

Getting a really thick covering of novalac epoxy will certainly reduce the chances of cracking, and continuing to move the tank until the resin sets is also a good idea. Most failures occur due to cracking, and anything that makes this less likely is well worth trying.

Ah heck you've made me pensive enough already with useful educational tech details, so nothing for it but get my two obsolete Commandos going and wait for my ongoing relief or my burning tears, tank, carb and engine surfaces.