Unfortunately for me anyway, the only truck I'm even considering aftermarket parts for, Integy is the only one that makes them. I have an HPI Jumpshot MT that i eventually want to convert to an SC, and Integy makes a bunch of purple parts for it, and, even though i know i probably shouldnt, ill probably get them and see what happens. Typically, my trucks stay entirely stock, unless i dont have a choice. For example, my Arrma Fury, the metal diff isnt available anymore, and i have bad luck with the plastic set up, so, I'm eventually going to do a diff swap using the ball diff from the HPI Blitz. In 30 years, i have only upgraded 3 trucks, all of them with factory upgrade parts. My racers Edge Pro2 was the first truck to have upgraded parts, and even then the only upgrades were threaded aluminum bodied shocks, aluminum caster blocks, steering block, and rear hubs, and they were all RE parts. I actually like wrenching on them more than running them, and, since i take out all my stress and frustrations on them, i stick with stock parts, because whats the point in spending the extra money when i am just gonna purposely beat it as hard as i can, knowing I'm gonna break something. Oddly though, after all the issues i have seen with Traxxas, which steered me away from them for years, my personal experience has been that they are more durable, even stock, than some of the more expensive stuff i have had. I broke my LWB Arrma and my Losi 22S SCT way more than i did either my 2WD or 4WD Slashes.