Yo [MENTION=164476]Scrodzilla[/MENTION]

Probably a stupid question, but I am currently building up a black label and was planning on putting S300s (or potentially omniums) on it, like I have on my commuter. However, to save a bit of money, I was thinking of for the time being putting the S300s that are on my commuter on the black label, and just putting the stock cranks back on, then once I have the cash, get a new set to put back on. Would switching out like this, even if I was careful and did the swaps properly, potentially screw up the bottom brackets?