Does anyone know how deep you can make the box under the seat of an 09 Heritage? I have the one from Power Comander V that replaces the box in the rear fender under the seat where the ECM sits but I need more room for stuff. Can you buy one or does anyone know how much space between the factory box and if the shocks are fully bottomed out? I was thinting of making one or having one made if I cannot find one.