That area might be an indication of success, but definitely still use a healthy amount of care and caution if you do decide to pull it. I just bought myself a BK2K (hello club btw!) on which the previous owner attempted mylar removal and it went terribly wrong. Mirco planned for next year when my pinball budget resets.

My Magna-Save has exactly the same deep wear spot, and I believe what I'm going to do about that is drop a mylar circle in the center of it on the new PF. I can't speak for everybody but I would definitely mylar a common wear spot even on a fresh playfield. I've already done the same to protect the area around the fish on my Road Show, a common eject hole wear spot on that game.

Now a couple questions from this new owner!
-Are the right flippers supposed to be dual-action? My right flipper button is just a single set of blades that appears to have both flipper wires soldered to the same terminal. Converting is trivial but I'll leave it alone if that was the intended design. My Swords of Fury and Rollergames (slightly older and slightly newer, respectively) both have dedicated switch lugs for each flipper.
-My volume pot doesn't go low enough! The lowest possible volume can still be mildly headache-inducing in my quiet basement late at night. It also has a lot of crackly flat spots, as does my Rollergames. If I replaced it with a brand-new 10K pot, would that fix my volume woes or should I seek a different ohm rating?

That's awesome as I'm looking for one as well.

Made some stupid mistakes unloading my MGC trailer resulting in an accident that pretty much wrecked the head on my BK2K (repro glass included...). Shoutout to that insert panel being an absolute chad and protecting the electronics by holding the entire weight of the game off of them.

After some inspection of the damage, I am thinking that this backbox may not be worth saving. Bottom is pretty delaminated, top splintered off, and some pretty big chunks missing from the MDF on the back. I probably should be more mad about this, but to be honest, this game didn't have the best-condition cabinet to begin with.

So at this point I'm going to build it a new head. I was already planning on assembling two of them for other projects so the need of a third is just going to motivate me to get it done. Advice needed: How much of a purist should I be in designing it? The other two backboxes in the pipeline are vaguely Bally-style (side panels with rounded front corners, slight overhang, T-moulding). I like this design and it would definitely make it easier if I built three of the same backbox. On the other hand, would people be horrified by the historically incorrect backbox construction when playing the game at shows?