I suggest you use a Hasselblad Quick Release and make, yourself, camera plate out of Brass, in the form of the sliding locking plate, on camera, with a top plate of about four to five inches, round or square.
You are lucky to be in Germany, where you can find an engineer/machinist trade school and pay or trade with a good student, to make you such a plate or two, perhaps others for 35mm cameras, Tales, size adjusted in the top plate section
With a hack saw, a file, a small drill, hand or power, some strong Picture Red and the odd or end pieces, and brass plate, from a hobby shop, you can do this yourself in a few hours, just be sure to make a card stock mockup, first.
The Hasselblad locking plate you can buy, used, and you can also make the camera plate with pins, that can keep a LF camera from twisting to the sides.
IMO.