Thought I'd post this link from where I bought my controller. We did have a controller on our TV, from towing a smaller popup. It was a Tekonsha Voyager and it failed on our first trip out in our TM. I asked questions about that failure on this forum, Bill and many others urged the purchase of a Tekonsha Prodigy. Our next trip was 2,100 miles round trip with NO troubles!!
http://www.adventurerv.net/tekonsha-...ol-p-1432.html
Good luck with the rest of your questions. I'm still a newbie in the TM family so I'll limit my answers.
Bruce