adding spacer of 1/4 inch to help increase spring tension

i pulled out the valve from my condor tank to deburr the two holes on both sides of the bottom of the valve stem and was wondering if it would increase the power of the gun if i bored the holes bigger i am a machinest and have i cnc and two manual milling machines,could i have dimensions for the larger diameter hole if any.also i made a 1/4 inch shim to put in front of the spacer in front of the hammer to increase spring tension to up the power and consistency and the power went up quite a bit i machined the extra spacer out of delrin and in the position it is in it should also help add some weight to the hammer therefore the moving mass and it seems to cock harder and a larger power difference was noticed