I've used a Hitec 5645MG in 1/8 buggies and it's OK but the 7955TG is much better suited to the stresses placed on the steering of a 4WD vehicle. I use a 5645MG in my SC10 steering and it's powerful, probably overkill. It's more than enough for throttle/brake in a buggy. I use a 7955TG for the brakes on my 1/5 on road car and it stops a 30lb car on a dime. I think every time I've ever been disappointed with RC it's because I "saved money", I don't do that with servos anymore. All of my cars have more servo than they need and because of this I can't remember the last time I broke a servo. Buy a 7955TG and 5645MG and you'll have strong steering and great brakes.