The RF Mogul Eagle is a great product and it worked great for the entire Alaskan Highway and Alaska for DTV. I did not change the DTV service address for the locals on that trip.
I called about converting to Dish and the kit was $350. You change the arm, LNB and firmware. And likely a kit to convert from Dish to DTV. No personal experience on this nor have I needed any repairs, rather called and asked.
I haven't needed any repairs or firmware updates but quite easy to do in the field if required. Firmware updates are trivial, download, save to a flash drive, insert into the controller and reboot. If it's that easy for a owner then it seems likely to me that a tech would already have the flash drive.
My view on the company is quite different than Bill's. Namely they were not allowed by a recent owner to fix or redesign the MonoSat dish and started a new company. And there are too many posts about having to send the entire Winegard dish to them for repair. Sounds like fun to remove and ship that monster.
The RF Mogul roof dish does not have any electronics that can be exposed to the weather, rather it's all in a small box that is inside the rig. The dish contains motors, gears, LNB and GPS antenna, all easy to replace parts if necessary.
Search operation: Acquire GPS, about 30 seconds if rig AC power just turned on. Full elevation, set skew from GPS input, set elevation from GPS input, start azimuth rotation and find the birds on the first rotation. Optimize dish pointing for the signals. About 3+ minutes.