---here's ur answer---> Threaded block to anchor top to chassis had pulled up. Hammered back down w. table knife handle (Steiff pattern - important) AND Seal mat'l in top water-excluder channel had settled. Fixed w. big 3/32 o-rig snipped to size & gorilla-snotted in place W4UOC has same trub on his / Tom I'll get another ring Marty