In general, I agree with you. But it is a necessary upgrade on these trucks. If I had the ability to deal in high strength glass reinforced nylon, I would do that instead. But I do not have $200K+ for the requisite injection molding equipment, so I just have to make do with a little bench top mill.That being said, I never was a fan of aluminum arms... they seem to cause more problems when the issue is usually driver error. No offence
Also, these are not your usual chinese cast & machined parts or 5,000 & 6000 series CNC bits that bend & break with relative ease. 7075-T6 is the good stuff.
You will quickly find that 2 extra kits worth of arms doesn't last very long if you actually drive the thing. All it takes is one bad landing, you'll break the arms at the forward inner hinge just as I did with a dozen of them. May not be driver error; another kit hits you during take off or in the air, a gust of wind, whatever. Crashes are gonna happen, and broken arms as a result is a known problem area on these trucks.
It's an animal on 4S with a 2150KV can & 16T pinion. With a top speed around 45 MPH and the ability to do rolling wheelies even with a center diff, I have not yet felt the need to run 5S or 6S. Similarly, I've no desire to run anything hotter than 20% in the nitro; all it will do is cause more spin-outs. As it is, I'm having to dial it back with restrictors most places I drive it.The E801XT is an animal with 6S battery!