My CRT has 7k in the front, 30k in the center, and 3k in the rear. Works awesome for me. Although I can still pull the front tires off the ground on the straight away, so maybe I need to thin the front a little?
Yah need to thin the center if you're pulling the front end up.
Actually I'm going to thin everything. My steering isn't as tight as I would like it to be so that should help me there too. I'm thinking 5/10/1 as my f/c/r.
I use 7k in the front and rear and 50k in the center. I had good results with a nitro engine so we'll see if it still works fine when i get the brushless stuff in there.