I don't have many mods in my TZ, but one thing I am keen to do is put gumballs in the machine along with a LED kit. As others have pointed out, on the backglass image the gumball machine is filled with pinballs, so I would prefer to reflect this rather than have the usual coloured balls. Normal sized pinballs seem too big and out of proportion, and I'm not even sure would fit.
I had a brainwave last night thinking of Family Guy and the small pinball in that game, and thought I'd order a bunch of those. Then I found there's all different sizes out there (www.pbresource.com/Balls.html).
So my question is, do you TZ guys out there think the 3/4" ball would be good, and how many would I need to order to fill up the machine? Its diameter is 70% of a normal pinball and it's about a third of the volume.