I changed out the CEN battery/receiver (B/R) box and installed an OFNA Pirate 10 one. This give better clearances for linkage set-up when using the slide carb TRX 2.5. The earlier post picture showed the TRX 2.5 installed using the CEN B/R box and bent carb linkage. I used a 1/8" thick Al plate that was 2-1/4" wide. Some people just simply cut the stock top plate. Side mounting the steering servo lowers the overall CG of the truck and eliminates the exrta weight of the large top plate.