So, Anapan, here is your commission!

What he wants me to do is remove the board from the bluetooth controller, install it into a PS1 controller (ideally), trim the boards as needed and rewire and wire as needed, and keep the rubber tact feel of the PS1 controller. The battery life is poor on the bluetooth controller, so I will be making it far longer - the system uses 1 x AAA cell, i'm going to aim to fit in 2 x AA's and wire them in parallel; which will give about 5x the battery life.
I haven't used bluetooth before, so Anapan supplied me with a dongle and two controllers to play with.


Into...

Tomorrow, I intend to edit some of my IntoDream videos (to make one WIP video), and spend a fair bit of time experimenting with the bluetooth controller before ripping it apart, gutting it and starting the mod.
As is my way, i'll document this project fully so others can copy my project work if they want to.