These are the parts I used to attach the Virpil TCS collective to 4040 extrusion. I included the Fusion files so it can be modified to fit other setups.
I also printed a side plate for the collective housing with a hole to attach a bolt and steering damper.
I attached everything with standard T-Nuts.
I would recommend printing with stiff material. I used ASA but PLA or PLA+ should work if you increase the perimeters.
The author remixed this model.