[neallewis]

Yokomo Europe Kit with the carbon towers and roll bars is a great starting point, you could build it and run it fine without and extras. The belts will feel tight, but will loosen up. Others have had issues with arms breaking, I've not, and have had some serious hits. I'm not convinced about boiling them anyway. The new rear arms are a redesign of the original Bmax4iii arms. They thickened the areas around the hingepin which used to break, now they are breaking in the middle where the shock screws in. I'd suggest not cranking the shock bottom screws in tight and they will last like mine have.
As you have the yz2, they pair up well. Lots of common parts, the rear ends are basically the same, and work the same for setup.
I did bling mine out from the initial build, but don't see a problem with the kit. I didn't like the plastic servo mounts, but they will work fine. I don't think any part is weak, but I have seen a couple of people melt the front clicker, but not sure how loose that were running it?
There is also a yz2 - yz4 Facebook group that's pretty active with build tips and setup hints.