The guy that runs the LHS was running the same diff you got coming and a mamba brushless setup with LiPo. We figured he could go ahead and clamp that sucker down (the slipper) and not tear up the MIP stuff. A week later when I went back he told me if I ever built one to make sure that I didn't tighten the slipper all the way. He ended up tearing up some stuff in the diff. He didn't just detroy it where it exploded in a million pieces, but it did break in a few places. Just thought I woud pass the tidbit on. But you will be able to get max power and backflipping torque with the slipper backed off a bit. And with the mamba system, you can program all the throttle and brake curves for your driving so if it's launching too hard for racing, you can tune it where you can get max power while keeping the front end down to get the holeshot.
Matt, you've grown so much in your RC knowledge so fast. You're building some very sick rides, and motivating a lot of people here on the forum. You're like me in the aspect that you're getting into several different areas of RC. Nitro, electric, on-road, monster truck, racing, bashing, mini, etc... I just wanted to let you know that I'm really impressed with that you've already learned in such a short period of time.