Funny the glass thing came up. I was considering getting a sheet of Invisiglass. My Spooky glass is exactly the same dimension as the Invisiglass specs; I think 43" long. I will say I have struggled getting the Spooky glass back in at times. I now pay attention to the end that goes in first and it barely fits. Haha, sometimes it is like a puzzle....I flip it, reverse it...cuss at it....and then magically it fits. I have not fooled with trying to square the cabinet. I might simply look at notching the rear stop just to give me a fraction more length.
I have noticed my 'late model' game seems to have several improvements in it...many of the reported issues I read about 6-12 months ago are no longer evident (or possible) in my game. In fact, my game has been perfect out of the box (less my ignorance on the operation of the Sanitarium flipper). So, it is entirely possible the guys in Benton shortened the glass to alleviate fitment issues if the cabinet is not perfect. Just a hypothesis if your glass is shorter than the Invisiglass.
I sold my Jurassic Park Premium for this game. No knocks on JPP, it is a fine game, but this one is more alluring. I like this a lot...more so than the long clanking shots in JPP. Sound, lights, and emotion are unmatched in Halloween.
Way to go Spooky! Great game; great continuous improvement.