I managed to fit the 50lt Waeco no problems with front and rear handles on. I may have to take the rear off when a cargo barrier goes in though as there isn't a lot of room between it and the headrest. Even if the fridge shuffles around a little in the slider it doesn't touch anything. It doesn't really show in the picture but it is angled very slightly to follow the sahpe of the rear window a little closer. This also means when it's opened (side opening lid) it doesn't clip the tail gate.
Looking forward to your pics as I plan to convert the underneath of the false floor to draws and put the tent in a basket on the roof instead.
Cheers
Steve