Works great, just dremel sand the front part of the chassis instead of the cutting off your servo tab. Only takes a few seconds to trim it on the drivers side. Slide the front part of the chassis on as far as you can then peak in with a flashlight to see where the hang up is. First used it with a Hitec 7955TG and HB Racing horn HBS67168. Moved onto a more powerful servo with a ProTek Associated style clamping horn PTK-7822-BK.