here are pictures of what ty showed us on the team page.. and i did exaclty this.. cut off the plate that the speedo originally sits on and then use the XB2 motor plate brace to stop the batteries. I drill two new holes in the chassis 12mm forward of the rear pair of existing tray holes.. what i mean by rear holes.. there are 4 holes in the chassis.. 2 in front.. 2 in rear.. using the rearward holes.. o0 o0, measure 12mm foward of those 2 holes.. add 35g of weight on the motor side of the car.. balances out perfect on the hudy balance pins