Thanks Wilco. I was just about to thank jflig for his suggestion but mention that these tanks are for a 'B' series which are quite different to an 'A' series tank including the base pressing, the rear mountings single outlet etc etc. On the Star-Twin tank question, I'm still not totally convinced that the correct tank does have a recess for the badge, I thought that the 4" round plastic badge was just fitted onto the surface of the side panel with two 6BA screws. But recently I have been assured by a very knowledgable and experienced chap that they did have a recess and used the clip fitting like on the swinging arm bikes as he has had a tank like this! I do wonder if hes getting mixed up with the late standard A7 tank that did have a recess but only for the 3" badge. If any owners of 1953/54 Star-Twins could confirm this it would be much appreciated. Regards, Peter