Thank You everyone..
Yes the trailer is Fiberglass type construction...
the metal coat hanger will do.. I may upgrade radio and antenna system..
I know about fiberglass and types of antenna's needed.... NO Ground Plane provided by unit body...
just not happy.. more proof of bad construction in the RV industry and the original owner not taking trailer to dealer when it was under warranty..
and I think the fiberglass is the reason my trailer is 800 pounds more the both tags state.. 8,300 to tag 7,500.. as this trailer had the option of metal or fiberglass sidings, also option of real wood cabinet faces and spring loaded hinges. and Front Kitchen.