HUMA regultor with Hill valve. In my Armada.

[HighAltitudeAir]

I have the Hill intermeadate valve with the the .187 TP and barrel port. I have a HUMA regulator I want to use with it. I also have a Hill gage port which is much larger than the Huma plentum. Should I enlarge the hole in the HUMA gage port? I like the HUMA regulators better than factory or other regulators. How much bigger should i make it? I have a mill and lathe both capiable of enlargin the gage port plentum. The reg is set to 140 bar.grain JSBs and would like to try the slugs in my Benjamin Armada. Oh I also have the Hill light alum hammer.
Thanks inadvance.
Ch