I wanted to mount a monitor to my Domyos recumbent bike and had an Ergotron monitor mount from an old setup, so I've designed an adapter that fits the wall plate to the display-pole of the bike.
It has M5 threaded inserts for fastening the Ergotron plate, and M4 threaded inserts for the cuff around the pole on the bike.
It helps to heat the cuff with a hairdryer or heatgun to wrap it around the pole, so it's a little bit more flexible and adaptable. I recommend to print it rather with many perimeters than higher infill, to distribute forces on the cuff and the holes for the threaded inserts more evenly.
The author marked this model as their own original creation.