I have a problem, its been pissing me off for ages. chain gets a tight spot in it like the chain ring isnt sitting properly, so when i line itup and get the chainring central its cool, then i do my cranks up, its fine. then when i pedal the chainring moves and i get tight spot again. brought new cranks- still happened, brought a new chainring-still happened, wtf is it. yes i have one of those top hat washers aswell, its really f**king annoying