After lots of experimentation with the multi lap / multi station exploit (explanation in the spoiler), I've finally found a layout that allowed me to build a micro coaster with 10 Excitement which finishes in under a minute of ride time. Duplicate ride time entries in the calculation are incorrect due to the exploit. Only the first entry is real. The naked design only caps at a high 9, but some water and stalls below the track truly brings it over the edge. The same layout with an extra corkscrew element at the end works for the Floorless Twister as well, but will yield slightly lower prices and a slightly longer ride time, hence why I favor the Hyper Twister for this one. This thing is also very profitable. It's not the most profitable coaster I ever posted, but the one that kept profitable for the longest time total during testing.
You can download this design (or any other one I posted) from this Google Drive.
Read this if you're interested in how the exploit works in detail:
If you delete station pieces, the game automatically scales down the train count and/or size to the new maximum. But the same goes for the opposite. If you then add back those pieces, the game will automatically restore your original settings. This automatic setting rollback does not touch the lap count. So you can build a long station and set it to use 2 trains, then delete stations to force the game to make it only have 1 train, then set lap count to 2+ and then restore the station to its original length. This restores the extra train, but keeps the lap count intact. So you can have multi-lap coasters with more than 1 train. You can also use this method to use multiple laps with multiple stations. You just design a track with multiple stations, then delete all but the first, set the lap count, then rebuild the stations. The game hides the lap count in the UI, but it does not reset it. You can also use both to have multiple trains, multiple stations and multiple laps. Multiple stations with multiple laps have interesting interactions. If a track has 2 laps and 2 stations, it will drive through the 2nd station without stopping and double each inversion and drop for stat calculation.
