Does anyone know the size of the little grub screw in the hole under the valve block of the Huntsman Regal ? It is hard to describe where it is but those with Huntsman know which one I am talking about. I was trying to adjust the gun for 11.2 ft.lbs and my shaky hands failed me . The grub screw is no where to be found and I hope that it has not fallen inside the valve block otherwise I have to dismantle the gun.
Thanks for your help.

A.G