These racks are great, but unless I'm stupid there's only one way to mount the hinges for the front and back doors (sold separately). The hinges can only be on the right hand side, but I needed them on the left hand side so I had to make new holes on my own.
I also wasn't aware that there is ledge below the floor panel (which creates a hollow/empty space inside). I had to stack 2 of them on top of eachother so the ledge created unneccessary space between them, thus adding a few extra centimeters to the combined height.