Looking for new Mini

At the moment I'm working on my CRT.5 and will post some pics soon.

In the meantime could someone instruct my in the relations brushless motors/Esc/Lipo's : Kv - Amps - ESC Amps - Lipo Amps.

I would like to understand all this. I know I can buy a motor based on what everyone else buys but I want to know what I'm doing.

Links to some info is also welcome.

Second, does anyone know of a buggy body that would fit a CRT ?
Maybe with some mods. I kinda like the look of a buggy body.