Wondering what anyone's take is on this.
I had repaired a few Mills machines which had the dreaded brown debris in the glass windows; jackpots, reel windows, and escalator windows. The original glass pieces were in bad shape, scratched, yellowed, and chipped on the corners, mostly. They were different thicknesses of early day tempered glass, and I didn't want to replace the windows with ordinary window pane, so I used a 30 watt laser cutter and made multiple layers of clear polycarbonate on each window. The plastic can't break, is water-clear and looks great - but - not what you'd call "authentic" for an old slot. Since the polycarbonate material comes in thin sheets, stacking them does the trick and fills the thicknesses I was trying to apply.
Did I commit the ultimate crime, or is it acceptable to use the plastic? I really didn't want to use plain glass, and for the most part, the standard thicknesses available weren't really ideal for the slot windows. And, tempered glass is completely out of the question - seems no one actually supplies custom sizes that I've been able to find.
Oh, and rather than use that cement Mills must've used to set the glass, I used very thin adhesive-backed closed-cell foam strips to secure the windows. Hope that, too, was a good choice....
Feel free to ream me out on my glass hacks.