Took off, cleaned, regreased everything; except the freewheel and now it seems the freewheel is rubbing against the bb, making it near impossible to turn the cranks and I've checked the chain tension (it's not that making it stiff to turn), but it just really hard to turn. I took the right crank off... and everything ran smooth, so its not a case of the bb not turning. The freehweel and the bb are both done up nice and tight as well..... (not too tight). I'll have a look at the alignement, cheers for the help so far lads