Sorry man^, I'm pretty sure balance has a little to do with it to though, because if its off balance like a wheel its going to be a little wobbly and will end up doing all sorts of crazy shit. Not saying that your wrong I'm just adding balance to the equation.

sure balance counts, but a freshly rebuilt and upgraded turbo had damned well better have been balanced... if not that's the shops fault, not an inherent weakness.

thats what i meant but you phrased it in such a great way cre :D