Well I for the most part fixed it. With no fuel tubing, there was no give in the linkages and the servo was pulling the radio tray into the spur gear. So I took the center diff out and setup my linkages just how I wanted them, and I also cleaned the brake discs and scuffed the calipers with some fine sand paper. The discs and calipers had a bunch of oil on then, not silicone diff oil, smelled like WD40, and after cleaning them, they are much more "grabby." So anyway, I put it all back together and with my weak throttle/brake servo I have pretty good braking power, and the spur isn't making contact with the radio tray anymore, I guess because the fuel tubing gives and doesn't allow the servo to pull the radio tray into the spur. I will be getting a stronger throttle/brake servo though, so after I get it I will report back if it makes the radio tray contact the spur.