I finished the battery mod. I modified one of the screws into a tap with a Dremel cutting wheel. I was able to use the last four screw holes to mount it. I had to drill three holes, and used one existing hole. It is very sturdy and I am not afraid of the battery coming loose at all. I thought it would be harder, but everything went smoothly. I was able to use the existing center outboard hole. My RX8 Gen2 esc will be here this week and I should be able to finish it. I am using a T8 1900 motor and need help with the proper pinion for it. I put a 16 on it for now, but just guessing. I am using the 45 tooth steel spur gear.