I want to mount two rod holders to our 360 transom near the centerline. I saw a recent post of this done by mounting rod holders on top of a 330 transom cooler box, but I don't want them in the way if fighting from the chair directly aft. How thick is the aft wall of the transom cooler box on a 360 and how far away from the inner wall is the wall of the cooler insulated box? And how easy is it too pull the cooler box? I am wondering if I can screw them into the transom or thru-bolt them.