If anyone here is familiar with brocock bantam magnum valves you will know what im talking about. They basically use a 45 degree valve, with a brass insert on the hammer side and a much larger hole to allow self aligning with an oring. Anyhow I made a new bronze insert with a .001 clearence guide that floats untill you torque it down. I also turned the valve from .268 to .250. This minor work allowed me to go a full turn off the hammer and gave me a 20 shot string es of 3 fps. For some reason its alot quieter now?