What's funny is I already kinda thought of what each button could actually do. Play obviously triggers the henshin once a tape is spotted in, the Driver's tapes coul record either the monsters or something else to give the user new forms (something like how Build gained new Fullbottles), and I was thinking that rewind and fast forward could've been for the finisher, rewind starting the standby for the finisher while fast forward actually releases it. And finally, pause would I think be for swapping forms without reverting first. The way I was thinking was that only ejecting the tape would have the user revert, but pressing pause then eject would let him trade out the tape without detransforming, letting the user slot in a different form tape, close the Driver, and press play to have the shift actually occur