not a fan of the rocking frame personally. if you don't pull it right, then it's a pain shooting at a decent speed.
you can look into getting a Tadao chip for it. that should help ALOT.
as far as parts go... check out www.techtpaintball.com
they have some of the best parts in the freakin universe IMO.
Warrior paintball has a pretty nice comprehensive spring kit for spyders: http://www.ansgear.com/Warrior_Paint...cspringkit.htm
i know maddogz has one, but idk where to find it lol. maybe on their site if they're still running it...