I found a way to route exterior antenna wires into our XLT without drilling any holes in the roof (it's probably no big deal to drill holes and fill with Dicor, but I didn't want to do that).
I then installed my Wi-Fi Ranger and new Weboost 4G-X RV cellular booster today. It's not pretty, but it works! The last thing I have to do is organize and hide the interior wires with some wire molding that I'm ordering.
Here's a link to the installation steps:
https://habsontheroad.com/2017/05/09...lular-booster/