UTB18 Battery Servo Tray. Put all/most of your electronics onto the front axle of a UTB18 based mini comp crawler. V1 will work on the STOCK Capra chassis with a little dremel work by the shocks. You must set your endpoints to push no more than full luck or you can break the mount with flex, if you do break it message A&C Designs (Etsy: AndCDesigns505) and we will work with you.