Originally Posted by baggedbirds
ok, so does the macro line hold the valve stem closed? the hammer is still going to hit the stem when its fired right? Im not getting where the air will come from if the stem stays closed, i dont fully understand the inside of this marker
If you cut the macroline to the correct length, yes, it will stay closed. You're not going to fire it for the hpr setting. Zero out the velocity screw, air up the marker, slowly increase the velocity and watch your gauge until desired setting.