Hi Hendrik 
 wow thats some trailer you have  

 did we meet at arnhem a couple of years ago, I must say iam thinking of the mini artic route, thinking of converting my defender 110 to a 5th wheel pick up and changing the vehicle towing rates and making a nice step frame trailer maybe two sections of lorry chassie thats about the same width as a carrier track and strong a purpose built vehice and trailer? 
 Saw a iveco cab and chassie with a mini artic trailer with 5 cars on it when i was in holland last year that gave me the idea, 
 kinda like this photo i found on the net but my landy instead ? if a transit can tow sumthing a landy should lol.