The Brook Fighting Board, this piece of PCB is definitely a work of art, it's small, reasonably easy to wire up, easy to update firmware, and a very clear and easy to understand layout which is completed with ps4 touchpad buttons.
The Brook Fighting Board is reasonably small, and i would say stealth mod into the atrox is definitely possible by cutting just a little bit of the plastic encasing the atrox PCB.
Updating the firmware is also another easy task and also completed with a video tutorial in case people find it hard to understand lol.
All in all, this PS4 fighting board is definitely awesome and alot more convenient for modding than all the other pad hack option out there. The only downfall of using this than padhacking an official ps4 pad is a firmware update for the ps4 can potentially break the PCB from working properly on the PS4 (which for now brook has been doing a spectacular job by swiftly updating their firmware.)