Putting the spider on Air is a good move and may be a bit expensive to start but you can take the air system to your next marker if you decide to upgrade.
The benefits
- More consistant over the chrono (shouldn't have big jumps you do with Co2 and temp)
- Less changing of o-rings
- Don't have to worry about freezing up during cold days
And the fact you can pick up 3000 psi preset (800psi output) setup which just screw in like your Co2 bottle for around £80 these days without having to change anything on the marker can't be bad