No upgrades yet, that I know of. I imagine someone will at least do metal tracks, but it's really a great little tank right out of the box. One problem that's surfaced is that during shipping the barrel can get pushed back too far. You have to stick a flinger in through the top hatch and manually push the barrel back to battery position. I had to do that on mine and it took a fair amount of force, but then it worked fine and the barrel recoil is pretty smooth. A lot of guys are removing one track link but I haven't and it seems to run fine for me. I'm hoping you'll get the new radio figured out and do a tutorial on setting it for the best results. I'm sure it has features I won't discover on my own, but I'm hopeless with radios anyway. The manual does mention the words "battle mode" but I haven't figured out if that's applicable to the M5. This is a controller unlike any I've seen so far, but so far I like it. If I can just figger out how to get the most out of it. You should also take a look at it on the "Military Tractor Vehicle" from WPL, which is actually a tractor/trailer tank hauler. I have a couple of videos on that combo if you want to see them. I took the Ural cab off the tractor and used a cab from a JJRC Q-60, which is a much better match for the M5 time-wise. It's going to be a fun project. Here's a video from before I swapped the cab.