Something that has been mashing my brain for a while now.
The anti roll rubbers fitted in the frame do not touch the tank. The distance across the rubbers is 59mm, the width of the tank tunnel is 67mm which leaves a 4mm gap each side.
The "head" of the rubbers is 11mm thick. I rang another supplier, theirs are the same. Am I missing something? I don't recollect having this problem with my A10 but that was 20 years ago and I have been drunk once or twice since then. ;-)

BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme