A couple years back I bought a Silvers pad (not Silvers-like) to replace an 80-year old Silvers. The orginal plugs are cylindrical and are a friction fit - push them in until they're flush and go shooting. The new model has slighly tapered plugs. I ground the bottom off a bit so the plugs could go in deep enough to grip and then went shooting.
If your plugs at least visually fill the holes, how about a wipe of rubber cement to keep them in place?
The only Galazan pad I'm familiar with is the lumpy Ithaca reproduction.
