hammering out headset cups?
I want to replace/swap around a couple of headsets on my bikes. When I was a kid we used to just hammer the cups out with a big punch and hammer. Can I abuse modern CaneCreek or Aheadset aluminum cups the same way or do I have to fork out the $25 bucks for the fourpronged Park cup remover? I haven't seen alternate methods mentioned by Zinn or any other books i've read.
Does anyone have a good way to do it on the cheap? Thanks.