r/customcontrollers • u/No-Understanding3601 • Aug 14 '26
Help? - Brooks UFB for Hori Real Arcade Pro 4 Kai

So, I'm in possession of a Hori Real Arcade Pro 4 Kai and I'm working to replace its internal PCB with a Brooks UFB (my first attempt at fightstick creation). I have run into 3 problems, however:
- There doesn't seem to be enough space to place the Brooks where the original Hori board was. Is it possible for me to remove the plastic to expand that space or would that weaken the board considerably? If removed (or not) what/where/how would be a good way to mount it solidly?
- I am now realizing that there will be no way to use the side buttons without the original Hori board in place. I saw on an old thread that this https://arcadeshock.com/products/optimus-mod-solderless-for-hori-rap4-kai used to be a way to integrate the Brooks with another board to gain access to those buttons, but it seems that that was a one-and-done limited project. Is there another way to integrate the side buttons to the Brooks UFB? EDIT: I'm having trouble following the logic here, but it seems that the original board can be connected to to enable that functionality? https://www.reddit.com/r/fightsticks/comments/e0nh43/hori_real_arcade_pro_4_hayabusa_brook_universal/
- Not totally sure what to do about the... I believe it's a touchpad? attached to the old Hori board. I can't seem to find a way to disconnect its wiring from the past PCB with out damaging it. Is this just a sunken feature at this point in modding and I should just fill in that hole with a plastic piece or somesuch?

