Well, I finally got it out. What a ***** that was! I replaced the washer with one that has a slightly larger opening in the middle

Sprint Booster is now installed and everything tests out fine. I'm not going to go into an extensive review because frankly, it's all been said before.

In green mode, you get noticeably faster acceleration.

In red mode, it's twice as responsive and not for every day driving for sure.

Worth every penny.

Now if only I can figure out why my brakes are squealing when I go in reverse...