
I used two aluminium tubes with 12mm diameter and +- 50cm length

tube clamps

I fixed the
tube clamps on a PVC board but you could use wood too.
The hole on the left is for fixing the camera

The same PVC board from the other side

Slide the two tubes in the tube clamps and fix them

A smaller PVC board with a 6mm hole to fix the tripod

Fix the second board upside down on the tubes

This screw came from a small 3$ table tripod

Fixing the cam
Between the tube clamps I used 8mm nuts to set the pvc board higher and to set the cam in line with my 35mm adapter

The mounting plate from the tripod

The cam on my rod support.
Now I can connect the 35mm adapter without problems. It's stable and no chance to damage the camera