I am in the process of trying to fit one of these to my 2010 AutoTrail Savannah. Its the one that you can operate from inside as well as outside on the Habitation door. Now that the van wall has been drilled I have had to go and buy longer bolts than were provided. 45mm were provided and I have bought 60mm which just fit. The problem is that I can foresee that the square rods that operate both the lock lever and the key/internal lock knob are not going to be long enough to engage or perhaps only engage slightly that the risk of disengagement later is a problem. Are AutoTrail van walls thicker than others? Has anyone else tried to fit one of these? Did you come across the same problem and if so how did you solve it? I will need to get back to the vendor on Tuesday to find out if Milenco can supply longer square section parts if I can't find a solution myself.