I made this part to attach the Camper / Robot Trolley 1500 to a small boat trailer.
Robot Trolley 1500 - Robot Trolley (robot-trolley.com)
It is designed for a 40 x 40mm beam.
I included two print versions. One is the part as it is, and the other one is cut in two pieces in Prusa Slicer. You may need to adjust / post process the connectors generated by the slicher for your needs.
Also included is a drill template.
I recommend that you use organic supports for printing.
The mounting holes are for M6 Screws.
The author marked this model as their own original creation.