when they go, look into either Hot Racing or MIP. I know MIP are pricey, but they are supposedly indestructible.
HR are also pricey, and carry a 50% replacement program for life. I have snapped a few in my ECXs.
Hell, Traxxas might make a HD version.
My first revo has stock plastic, holding up fine. They're like 1/2 hollow slip tubes.
My new "old" Revo has steel HD, which are probably 1/8" thick. Weird. Nitro also is much more for giving than electric.
These aren't actually twisting at the shaft, it seems fine from what I can tell. It's the U joints that are going. I really think the hard angle I had in them put a lot more stress. Happens a lot on real trucks too when lifted.
MIP is what I was looking at. $50 for a rear set, front looks like it's doing fine, not really showing any signs of wear. I got the same description of MIP when looking online, "indistructable". The downside was that they are supposed to be fairly heavy. I will look at the HR also. I believe Traxxas considers the standard shafts to be heavy duty. Didn't see any difference in what Traxxas offers and what's on it.
It's actually twisting the knuckles on the Ujoint. Pretty sure I know which battery is doing it. I have a 20C that's pulling the front up when punched and a 30C that doesn't. Same specs otherwise. I can see why HobbyPeople never got mainstream...Eflight batteries are not well received and this one is beating a HP battery with a 50% higher C rating. Think I've pushed the HP battery for a while though so it may not be real fair.
Going ahead with my parallel battery harness. I have a couple small 2S I can put together and test out. If they hold up it will give me another option to drive a little longer between charging. Will be the equivalent of a 2600mah 20C.