On our maiden voyage in our 14-44-5 last year we noticed water coming up from the road and pooling under the mattress. The dealer tightened the base and the problem appeared to be solved. We have just returned from a trip and have noticed the base is rubbing. When the base is closed there are plastic right angle bits, sorry don't know what to call them, up the top in each corner. These are shaving off as we travel and in some places are through to the metal. The lid appears to be rubbing on them and when we open the bed we are picking off shaved bits of plastic. It looks like it could be rubbing on the studs for the security screen. I seem to think if the base was tightened at the bottom where it joins to the van couldn't this cause the top to kick out and rub on the lid. Has anyone else had this problem.