I recently restored a Black Hole that I'm about 90% sure had the original balls in it. Naturally I replaced them with new ones, the "1-1/16 in standard" pinballs from MarcoSpec.
I understand the game might play a bit faster with a clean playfield and balls, but it seems like they are significantly lighter than the originals. The balls are constantly going airborne and THRACKING against the glass, either after one-timer shots, or just bouncing around the pops to the upper slings, etc.
What really convinces me they are significantly lighter is that when the balls are returned from the lower playfield, and the "re-entry" gate is open, without fail, each ball hits the gate and (say you have 2-ball multiball going), go CRACK!.....CRACK! against the glass. It is very loud and distracting, and I'm worried the glass will eventually end up swept into a dustpan in pieces.
I also decided to replace the balls in my High Speed, and immediately put the old ones back in because the game suddenly played WAY too fast, and again, I thought something would end up broken. It was almost unplayable.
Does anyone have any insight? Are the old balls more dense? Is anyone selling slightly heavier balls?
Thanks folks -