I have just received a Seiko quartz chronograph from the bay which is great, but it needs a new battery and the case back is on super tight and I can't get it off. I've tried using one of those cheap 2 prong case back removers which though crappy, has got the back off dozens of watches before but no luck this time. I have tried using a cold ice cube tray to slightly contract the metal but nothing. I have tried using some WD40 lubricant, but it won't budge at all. I have ordered a better 3 prong case back remover from the net, but it will be a few days before it arrives. Any one got any tips on how to remove it? I don't really want to have to go to a watchmaker and pay, but jeez, I can't get it to budge.