This seems more straightforward (by recollection) than getting into the rev. A-D. I figured I'd be going in there eventually to replace the HD and then I could see what was jamming it. I'll wait until I get some ram so I can do it all in one shot and to minimize the chances of stressing the plastic more than need be.

There's no harm running the iMacs without a PRAM battery, right? I get a little paranoid about leakage.