basicly as the title says I've bought a broken Vamo V2 and fixed it, i know it takes stacked 350's or a single 650, but I'm sure i read somewhere that it can take a single 350 but when i take the end cap and extension off the end cap doesn't screw on to what's left, to be fair I can't remember where i read it so i could be making it up. can anyone enlighten me cos i'd like to be able to out and about with a 350 in it cos it's bloody hugh in 650 mode.