Ok, I'm going to lay down a quick guide to ultimate efficiency for the autococker, here goes:
1) You'll need to know how to time your 'gun. This is the most important thing. If you do not know how to time a cocker, got to
paintballravi.com and learn.
2) buy a set of springs (you'll need to buy the approiate springs for your 'cocker 2k or pre 2k. I'm not really sure what's different, but it's out there) and a valve tool. Madman makes a nice spring kit. both can be had from
g3pb.com for the most reasonable price I've found.
3) Sweet spot your ergo reg. This is done by turning up the reg's pressure in small increments until your velocity eventually starts to go down. You should do this with the velocity screw backed all the way out flush. If you are with in 30or so fps (lower) than your desired velocity, you're golden, just use the velocity adjuster to finetune you velocity. If not go to step 4.
4) If your velocity is too high, remove the current main spring, and insert a softer one. If it is too low, insert a heaver spring. Green Valve/Green Main is usually a good place to start. Ideally you will have the lightest main spring in that you can to lower your cycle pressure. Heavier Valve springs are more efficient to a point. But the heavier the the valve the heavier the main must be, and the higher you must make your cocking pressure.
After every time you change springs, you must resweet-spot your reg. and every time you change your valve spring you must (obviously) retime your 'gun.
Let me know if any of this needs further explaination.
-Micah