You don't like the spontaneous spinal adjustment?
Sounds like the top of the launch with these effects?
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I'm guessing if there was any track for this it would be stored behind USF, not mixed in with the deliveries of other things for EU, right?
It sounds like the high-stressed portions were replaced. Considering Nemesis (1994) coaster is just now getting the Renewable Hulk treatment after 28 years of operating (and that's outdoors), the majority of the track is probably in good shape. Most things generally store well in cool, dark places and Mummy is one of the few coasters in Orlando that are completely sheltered. It might run as much as the Hulk but it doesn't take the same outdoor beating. Not to mention the coasters on Mummy aren't as large and heavy which would otherwise add additional track stress over time.
I think an average 8-15 more years is a fair estimate before the entire thing might need replacing. But if this is going to stay that much longer, they really either need to redo everything (bring everything up to Day 1 opening as much as possible) or redo theming with something entirely new.
It's a testament to how great the coaster is so the ride itself doesn't need changing, it just deserves the show scenes to get some equally awesome TLC. Perhaps with EU's opening enough guests can flock over there to give them time to do more substantial work.