Added 'SHORT_ARMS' option for TopSpin rides. Halves the length of the visual arms, so they only go from the centre of rotation to the seats, rather than extending beyond as a counterweight.
Fixed a bug with TopSpin's FLIP functionality, causing seat and arm rotation to not line up in some configurations.
Fixed a bug with DropTower's breaking, it should now slow down over the full 'BRAKE_DISTANCE' setting.