One of my favorite Transformation story tropes is when the TF subjects try to get turned back to normal (either by taking a crack at the TF trigger themselves or other wise), only to have it not work out as intended and go through multiple tries. Unfortunately, I wasn't able to use it in the "Exchange" story because of the magic system I had/have set up for it. Not with the two main characters, anyway.
However, in this non-cannon piece, we see what what one of those missteps could've potentially been.