The only sensible way to fit wheel locks is by using a jack, dragging must induce stresses on the lock bolts, the wheels and the chassis, I would have thought. I do agree that the alko jack saupplied is not " user friendly" and am still looking for a practical alternetaive.
We also have a Delta TI and I assume that the problem with the front blinds is that they catch on the window seals. we have had that problem, along with many others, and our dealer resolved it, eventually, by fitting spacers, supplied by Lunar between the blinds and the wall of the van, also, at last, we have been supplied with curtain rail stops to stop the curtains sliding off the rails every time you move the van.
However, other ongoing problems we have is with cracking to the rear panel, chips and discolouration of the alloy wheels, radio reception, fit of the oven doors, fit of the window seals, discolouration of the door frame, which we are told is due to the bending of the section to form the frame??? and the list seems to go on.
NOT IMPRESSED!