About a year ago I watched Ferrix97's video on Powerbook power supply repair and how to open one up. I tried using a couple screw drivers as spacers but found them to be fairly unsatisfactory.  I still ended up with some scaring and damage to my casing.

Today I needed to open one up again and I spotted a couple tiny pencils as I was walking out to the shop and though hey those might be perfect.



I put the power brick in the vice with the pencils, applied a little pressure, and POP! It came apart perfectly and easily without even the tiniest scratch!