I alomost used this mount, but made my own, This is what I did! Okay take your old servo tray, cut right behind the mount behind the steering servo, sand it down, and make it look good, now take your transponder mount, and sand down the mounts just enough to make it flat, but not affecting the screw whole,now take the mount and push it up against the servo! Now take and mark the wholes and drill two wholes for the transponder mount to screw into! once its secure take and mount your transponder on the bottom, two sided tape your receiver on top and dont have to buy a dang thing!! Here is a link to the pics oon a thread!!
Or you could always help SNR out and buy there 25 dollar mount!!
OR if you dont already have a motor mount buy one from RCM and at the drop down menu push the add servo mount for an additional 5 bucks
http://www.rctech.net/forum/electric...823-mbx6e.html