Too far-gone to mess with, IMO.
Space Shuttle is a great game, but it’s not rare (around 7000 made) and it’s neither difficult nor expensive to find one in acceptable “player’s” condition (or better). I would be afraid the effort needed to resurrect this Lazarus of a machine just wouldn’t be worth the time. Restoration of a derelict pinball machine can certainly be a rewarding and fun experience, but plowing through all the mouse turds and other flotsam in THIS game would be a bit too gross of a job for me (then again, I’m sort of a “neat freak” who strongly dislikes dirty jobs and does things like wearing nitrile gloves when working on a car).
(I have seen several retail listings for this game in good condition for $3500-4000 over the past year or so, so I figure with a little searching a good one could be found for even less through a private seller.)