FLM brushless savage x building

[Joram]

Is the motor too big then?? I prefer no spacers, i want the chassis as stiff as it can be...

Wich motor can i use without the spacer? with 5s/6s...?
There are zo many NEU motors, 1515 , 1512 , y, d 1.5, 2.3 what does it all mean????
I want much power but not too much that is will destroy the diff's etc...

And that gear set, is that something for the money? because it's alloy gears...

Greetz,
Joram