Ok been told by LBS that my chain line is well out, this of course was after my chain came off and wrapped around rear wheel, twisting and bending as it did so, with a rear wheel lockup to follow. He tells me that the Langster is a big pile of poo of which I`m now in some agreeance. However he has suggested a rebuilt back wheel with a differant hub which will push out the rear cog further allowing, hopefully a straightish chain line, its 5mm out by the way ! Would I better buying a new front chainset and BB in the vain hope that I could get it more or less bang on ?