Quick tuning instructions:
Remove all LVL 10 shims.
Pick 1 carrier o-ring and stick with it.
Use #2 carrier (2 lines, no dots, or largest one you have).
Shoot 1000 shots to break in o-ring.
Move broken-in o-ring to largest carrier that doesn't leak.
Use red spring for 285 fps. Use longer spring for higher velocity or to be more gentle (fragile paint), shorter spring for lower velocity or to be less gentle (thicker shell).
If bolt sticks after encountering a jam, add a shim.
"You don't use science to show that you're right, you use science to become right." -xkcd 701 feedback