Has anybody got one of these fitted to a twin axle van,if so how do you rate it? I gather it is different from most as the outside wheel rotates one way and the inside wheel rotates the opposite way,unlike other movers that just pulse the inside wheel, is this an advantage on the Rhyno. Also most manufacturers recommend fitting the mover behind the rear wheels of TA, does the spray and muck thrown up cause problems with the mover mechanisms.Have any of you fitted a mover as DIY project and how did you get on, many thanks in advance,