Just seen your message,thanks. I'm just in the process of fitting an mc18 tank. Its slightly longer and the front mounting is totally wrong. Ive cut front mount off an mc16 tank and welded it on to the mc18 tank,movad rear mount on frame back about an inch and fit isnt too bad. Mounts for plastics dont quite line up but not a problem and I might end up with a usable nsr.