LogicalOne Kelly, I can shed some light on that, from what I'm seeing. There is a small internal casted toe weight area that plug/screw goes into. The plug does not hold the weight in place.( as that is part of the casting) IF the weight of the waste removal is lesser than the plug weight, it would be extra weighting also; that, I do not know as I can't remove the plug. The plug only goes 1/2 way into the casted weight area, so I'd guess, Even-Steven on weight. Unless the plug is made of a heavier material than what was removed.(?)
Then again, I probably don't know my ass-from-a-hole-in-the-ground, about what I'm actually seeing. May be more highly technical than all observed. 😆