I can agree, the center drive cups on both my Arrma's are pretty beat, outdrives aren't too bad yet. I'm 2 plus years in on the mojo. Also, the lsd diffs never feel particularly "smooth" to me, but I just run em.. no failures yet. I converted some of them to "open" with the Arrma shim kits.. no idea which ones either, LOL. I really don't get too technical with things. Kinda spoils the fun factor for me. Run till failure, fix, repeat..
The only real weakness I've found from my Tekno's thus far are the cvds (
MT410). They do bend fairly easily, especially on bigger tires.. never broke one though. Remove, straighten and reinstall.. carry on. The 410.3 has been stellar.. I mean, it's just a tank in 1/10 scale for me.. albeit a fast and stealthy tank. Love it.