Questions about the G2 Brace chassis

Hello, I'm new here, I'm from Germany, so maybe I make some misstakes in english grammar. I have an E-Maxx with a self-built 100 Amps controller called SBL-MEGA2. And I have a BK Wanderer 20S motor, this is a brushless motor with around 800Watts.
Center and drive shafts aren't original anymore and the diff cups are from Nova, aluminium. I have new idler gears from UE.
But now, I want to improve the handling. I think that the G-Maxx G2 Brace chassis is a good way to improve this, because the balance point is very low.
Are there any advantages, the Alu-Chassis has got, which the Carbon chassis doesn't have? I like the Carbon chassis more.
Then I read something about this special Motor Mount, does the original one also fit?
I think, this chassis is longer... Can I still use my center shafts?
And there's is an extension available, my Center Shafts will not fit, I know that, there are longer ones I think, but the material is plastic, is this strong enough?

Many Questions, I hope to get many answeres.
And can you please write me, which important misstakes I have made, because it would be good for my English lessons.


Greetz Arne


Take a look at my E-Maxx, in my signature, there's the Link.