be sensible
for the level of competition you'll be playing with a mechanical spyder I would recommend not worrying about ROF too much. So, you can probably leave the e-loaders alone. New bolt? Nah.. just remove the venturi from your stock one. What would I suggest you purchase? 1 - new barrel, 2 - invest in the air system...CO2 can still benefit from a regulator (Palmer Stabilizer's are good) and you can move it if (and when) you move to HPA. Those two upgrades should have you shooting relatively consistently and accurately. Remember what level you're playing at. If you want to run with the big dogs you have to spend some $$. Better to spend it on a good tourney level marker than to try to upgrade a lower level marker to tourney level. No dis to Spyders... I own one.