Harbor freight tools makes a good set for working on vintage macs $7.99 cant beat the price, I use it all the time, The screwdriver is extendable.. and if you have a tough screw in a compact, just take a pair of plyers and put it on the screwdriver and give it a twist.. Cheap, easy and effective. Ive got one SE/30 that is showing signs of capacitors going bad, One of these days ill get around to do it.

http://www.harborfreight.com/33-piece-precision-screwdriver-set-93916.html