Got the new antenna up and working yesterday, wanted to thank all for the help.
Went with the Rayzar on a modified Sensar mask. Cut the square tube down 4", so gained 7" over the stock Rayzar mask. Since the A/C unit is in the center, highest point of the roof, the Rayzar's line of sight now clears that nicely.
The biggest hurdle ended up being inside the RV. The factory had cut a way over sized hole for the Jack, NONE of the mounting screws for the new crank plate hit wood. So I had to frantically run out yesterday morning to find some sort of structural extension plate.
After hitting all the big box hardware stores, and thinking I was going to have to fabricate something from a piece of wood or whatever (which more likely would of looked like crap), found a neat solution at the local Michaels Arts and Craft. Used the 8" version.
Wilton separator plateAnd of course a new Sensar PRO to finish off the job.
So how did it work? Even though we have CATV in the home, I also have an OTA system, with a directional antenna up in the attic, pointing at the towers (out in Driver, Va.) On the main SOTA Samsung TV in the living room I get 40 channels.
In the RV with the Rayzar I got 36. Good enough. :)
BTW, one thing that was interesting. When one shakes the Rayzar, it sounds like a maraca :@, evidently there are a bunch of coil wires inside. So we will see how this thing holds up over time.