I had ordered an ARP for my 2001 U320, which has a side by side RM 1282 Dometic. After watching ARPrv.com videos at least six times, I dug into removing the chimney to install the sensor. NO LUCK !! I felt no " give " after bending the tab and opening the surround. I am tired of getting beaten up by inanimate objects. Has anyone installed one in a RM 1282?? Am I...