I want to take my Rambler on my RV trips. I've seen a picture of a rack mounted on the roof of one somewhere with trike hanging down the back. If you've done this I'd like to see a picture of it or if you know of a commercial source please let me know. I've carried 2 wheelers on hitch mounted rack but can't visualize how my 6 ft+ long trike could be mounted. Any ideas?