Originally Posted by MaD
I don't think you're going to get a pre-2k down to 250 psi without some more modification. Since you're going to go aka parts I'd get a 2 liter or Sidewinder. I expect you can get it into the 300-400 range with a stiff main spring and a heavy hammer.
That was what I was thinking, as I thought the pre-2k's had quite a bit less overall volume in the valve chamber than those with 11/16" valves. And it's not really a matter of going with AKA parts, it's just those are what were in the thing when I got it lol. Not that I'm opposed to using AKA stuff I've always loved their products.