After 30 years of collecting it wasn't until last year that I bought my first NIB pinball - an AC/DC Vault (Pro). I'm not really in to mods but I felt the pro edition could use an uplift. These are the updates I've done so far and they are all worthwhile (and fully reversible):
1. Shaker Motor
2. Hooked Lightening Bolts
3. Pinovators PINsub output up to an SVS SB-2000 subwoofer (which is also fed from gameroom music)
4. Color LED DMD from ColorDMD
Any other must have mods that I am missing?
-OD