I bought my 205 overnighter this fall and the surveyor recommended I pull up all the cleats, rodholders, and rail bases and bed them in 3M 101 to prevent water intrusion.  It seemed easy enough unitil I tried it and the screws just spin.  My guess is there are nuts on the backside of the screws and I can't figure a way to access them, short of cutting access holes.  Is there a trick to this or a different way of sealing the holes for the hardware?   :?