Concerning the "XPIN" mod with the Plasma Disk, the mod is basically this...

As each of the goals (9, 18, 27, etc) are reached the plasma disk comes on for a longer amount of time until it stays on when you hit special. It will "sputter" between each goal, think in terms of starting an old engine with goal to get it running.

The other operational mod is that if you light all of the pyramids or all of the eyes, then the plasma disk will stay on for the rest of the game.

During attract mode, it will periodically "sputter".

If you are interested in the mod, go ahead and get the backglass you want, and I will send you a link to where you can get the plasma disk. You can always install the mod control board later once I get the firmware complete.

Concerning an early backglass I don't know. I have been working with CPR and we verified it with what they were doing and it looks great. When I get it done and released I will have them post a link on their website to mine and make an announcement here that it is ready.

It has been kind of difficult to make it happen because I know of only one Mystic in my area and to get at it I have to ask the owner to pull it out of storage. He doesn't have the space to keep it set up.

If there is anyone with a Mystic in the East Valley outside of Phoenix AZ, drop me a line. We can work something out.