Have you seen the Resatec products at www.resatec.ch/index.html
No. Completely new to me. Thanks! I will contact them, and ask for their opinion. Maybe I can get some parts for free.
The initial idea was to use a very thick (2 cm) rubber plate, which should be able to stand the vertical shearing stress.
The fastening will be similar to the one in the attachment (initially P1 had a steering damper, like flevo and airbike, until I found out that it is useless). Of course the rubber plate should be much stronger than the one in the picture.
Attachment:
P1 Rubber Plate.jpg
Description: JPEG image