eXtremeRate Dawn Programable Remap Kit for PS4 Controller with Mod Chip & Redesigned Back Shell & 4 Back Buttons – Compatible with JDM-040/050/055 – C…

Overall a good idea and the kit does as advertised adding rear buttons, though several improvements are needed. I installed it on a JDM-040 that came with a new PS4 Pro.

Pros:

The buttons can be remapped on the fly and feel pretty good. You can assign any of the shoulder buttons, the 4 face buttons, or the 4 d-pad directions to any of the rear buttons.

It is a good DIY option for someone who want to use an original Sony controller. The charging and wireless functions of the controller are unaffected and you can turn on the console with the controller and use the headset 3.5mm jack unlike with some third party controllers/mods.

No soldering required if you don’t need to remap L3, R3, or the touchpad.

No drilling or cutting holes for buttons required because the replacement rear shell is provided.

Cons:

There were few noticeable quality control issues with the kit. The original board/wiring I received had one of the four buttons not registering and I had to request a replacement. Second, one of the button covers was a darker color than the others (see pic). Finally, the molding of the rear shell is OK but not perfect – the seams in a few places where the front and rear meet like at the handles don’t fit as neatly as the original shell and you can feel the unevenness while holding the controller.

The touch sensing foil for activating the remap mode isn’t great. When it’s installed in the recommended location, it triggers the remap mode accidentally if I rest the controller on my lap. I had to move the foil to a location under the light bar to prevent this from happening (see pic). I’d suggest they just add another small button to activate remap instead of the touch foil because of this problem and because holding down L1+R1+D+X is annoying to do in-game.

Button placement depends on how you hold the controller, but for me all 4 buttons use the middle finger to reach and the upper buttons are in a location too easy to accidentally press. I’d prefer if those were moved below to the handles and used ring finger or pinky to reach. This may or may not be possible due to clearance issues with the vibration motors.

I hope these are issues they can fix in a V2 of the kit, but it works pretty well if you get used to the faults.

Edit (1 month after installation): The carbon fiber pattern has started wearing off already in some places after about 30 hours of gaming, so be aware if you pick one of the versions with a printed pattern. See last pic. Buttons still work fine.