I was going to work on the front bumper but I found out I was out of the aluminum stock I needed so I worked on the chassis and battery tray instead. I cut a short piece of aluminum stock and drilled and countersunk the holes. This attaches to the center diff mount and serves as a brace and a place to hold the rx and ESC. I was going to run it without the mud guards, but decided to install them anyways. The battery tray is one that I have been using in all my conversions and has worked very well. It is pretty simple but effective, I have never lost a battery and it can hold the longer packs with no problem. I use either CF or aluminum as the base, cut to fit on the chassis. I then add a small stop on the side near the spur, this keeps the battery from contacting the gear in a hard crash. I will add heavy duty straps and most importantly HD velcro on the tray/battery. The straps hold the battery inplace and the velcro keeps the battery from sliding around. Since there are no walls many types of batteries will fit. I need to add padding to the stop and install the straps. The tray is then bolted to the chassis with two M4 screws, I try to use the exisiting holes in the chassis. Either rubber washers or a small rubber pad rest under the tray to raise it slightly to clear the chassis curve and also acts as padding.