I’ve sold both my ARRMAs for ET48.3s. Your going to love the fit and finish of TEKNO in comparison. Your maintenance will also be contingent on how you drive, and how often you drive. If you got 12 battery cycles out of your 6S battery in your Arrma before some driveline/diff maintenance is needed, I’d say your going to get more like 15-20 out of your TEKNO, simply based on quality of parts, and how well everything is put together and aligned on the TEKNOs. (I’m basing this on the info I got from TEKNO guys before I made the switch)
Now with all that said, there are a few guys that beef up the drive shafts and CVD shafts to take the thicker Arrma Shafts. I haven’t done that. I am still in the beginning stages of building my rigs and want to see how mine lasts first. That’s the other fun part about TEKNO, is you get to build your rig from the ground up! Take your time and do it correctly and the dividends on the longevity and craftsmanship are worth it! Cheers!