I don't know the finer points of the 200 but has it got an air restrictor power adjuster similar to the 400-500 models??. If so it needs winding right out so you are using the full charge, the adjuster just diffuses/disturbs the air making a less efficient path through the transfer port thereby reducing the power though you are still using the same amount of air each time as if there was no restriction and so wasting some. On my 400 I removed it completely and blanked it with a torx screw and then did all the hammer, spring, shim etc adjustments to get the power I wanted without any restrictions and not wasting any air. That has the added advantage of fixed power that can't be turned up other than by temperature and can't drop like when the adjuster decides to wind itself in of it's own accord. I've typed all that and now you're going to say it's got some other type of power adjuster