Originally I was doing a single tank to hang under the frame. This would result in lose of the head steady. Ive run unit Triumphs with & without, its on ongoing arguement how needed they are. But after researching a bit on the BSA singles, Id be more comfortable running a second upper tube over the motor to mount to. Ill make twin tanks that will attach to the sides of the two upper tubes in the same shape.
I am glad the stock tank got cut apart to stretch , the inside looks to have had pretty good rust, and then cream sealed. Ill strip the inside as well down to clean metal before closing them up, then use Caswell Sealer, Im not a fan of cream any longer.