I have just installed a Reich Mover to my 16.49.3 OB as I have a long-ish driveway that's downhill (12% incline) and very tight around trees.
I imported it from the UK after reading lots of reviews about different models, and seeing at the Supershow in action before deciding on the Reich. It has cost me about $1850 by the time I shipped it, paid duty (could have got out of it if I'd been smarter), had some brackets made up and fitted it myself.
Was a bit of an effort to fit, but well worth it now it's on. Have had to remove the second water tank for now, but will refit again in a slight different position shortly. It's powered off the caravan battery which needs to always have good charge for it to work well, so fitted a meter to make sure it is.
I have moved the step across by 1/2" to get it in behind, and fitted the double jockey wheel - it just doesn't work well without one.
It now makes getting it in and out of the driveway so easy, and handles the slope with ease. Here's some photos of it.