The servo does hit the battery tray when the suspension flexes but you can get creative and do something like make some extensions for under the tray. maybe take a pen apart and cut it to raise the tray up a bit or something similar. i had that problem so i made a battery tray from some sheet metal. it holds all my electronics up front radio box, ESC, wireless winch controller and the battery. i have my battery sitting length wise behind the front tires. helps to keep the COG lower.