Learned a new trick to reduce left/right slop on the front: Take a TINY piece of foam and jam it into the diff cup to push the dogbone out a tiny bit. Too much foam and it will restrict movement, but just enough and you still get the full range of suspension movement, and it pushes the wheel cup out enough that they do not play left to right anymore... I am thrilled to report my TT02 now can drive straight! Even on a 10.5T brushless, at full throttle, it's straight and stays straight! Now if only I was any good at driving.
I did end up getting and installing the 2 degree YR rear hubs, but mainly because I cracked a plastic one. I still have not tested them yet as it's been wet outside. But I don't anticipate it going any less straight.
I also just went back to the stock motor/esc in preparation for some un-organized playground-style spec racing with my small group as the last guy finished their build. We're all on our first TT02 and solvent adults, so the only rules we really set for our spec are using the kit motor, ESC, and tires (though I imagine, we'll be revising that in a few months as we want to up the speeds). I currently have more upgrades than anyone else, but am also the worst driver in the bunch, so we'll see what happens. My prediction is lots of fun. I think everyone else is planning on upgrading just about everything over time as well, so it'll be lots of fun to see how these races unfold.