Hey GUY's, i'm curious whether petrol tanks from other models (b31, m21) would fit my a10 plunger? I'm after the smaller 2gln tank. I can get a second hand one, chrome ain't too great. I found these tanks.. would they fit? Obviously the back end would be different. nb// The last photo of the black a10 tank would be my ideal one. Cheers, Guybo.