Samyang help

Good day I am on the way of finnishing the tunning of Samyang Dragon claw.50 dual reservoir.
Putted lead inside the hammer 2/3mm, now the spring is more stiffer and it can arm in low and high power, made a new transferport about 1mm weider, cut 4 coils from the export valve.
I want to kill hog in about 50 yards is it necessary to open/drill the valve body a little bit more to allow more air to come out. I am scared of doing that and have a leak in the plastic valve that retains the air inside the reservoirs, thank´s.