Installed the BMS Diff Brace today, as well as got my front underglow wired up properly to be turned on/off with the cars auto light sensor.
wiring the front light was WAY easier than the rear as all you need to do is tap into the correct wire in the headlight harness, so you can use the CK71 instructions as a reference to which wire to tap, No relay needed. However because you can skip the relay, the front underglow turns off with the lights when you set the lights to DRL only mode, unlike the rear/side lights. I can do an install tutorial/write up on this if anyone wants me to as the rear lights require a relay to be set up correctly.
As for the BMS Diff Brace, It certainly does what BMS claims. After the install, I let the car warm up and then did a 0-60ish pull while letting the rear tires break free using LC. The tires will still spin as they should when they break traction on launch, however instead of spinning until 30-40ish MPH, The tires where already gripping again within 10mph of releasing, maybe even sooner as it was so quick to grip it was hard to tell. Now on the drag strip I doubt it will help at all as my car was not spinning the tires there anyway, but for street pulls, it will 100% help. As a bonus, I noticed that on my drive to work this morning their was a noticeably less amount of vibration going through the center of the car. I have the Korean center console and before, it would squeak ever so slightly going over bumps or when the car is at the right angle because of the slight extra vibration my aftermarket exhaust causes. On my way to work this morning, not a single squeak was heard. Now this is only my first day having it on the car so it could have been a fluke, but still.
@Michael Hespe I honestly believe that for you it will help reduce spinning dramatically if not eliminate it completely when you do your roll racing. Worth the Cost for sure.