I'm going to be doing a little bit of surgery on my MBP today. Im swapping out my old HD for a WD Scorpio 320gb. The screwdrivers I have to do the job with are magnetized. Is this going to mess with my computer, or are these things too weak to do any harm? Hopefully this serves as useful advice for all of those people out there who plan on opening up their computers in the near future.