I am aware of two accessories that click into the back of the keon. One is the above mentioned table clamp ( Keon Table Clamp – Kiiroo® ), the other is the neck strap ( Keon Neck Strap – Kiiroo® ).
Both have this mounting block that clips into the back of the Keon. The neck-strap one has some loops in the back to insert the actual neck strap, the table clamp one has a ball joint mounted to it. I am not sure but I’d suspect that the ball joint is screwed into the mounting block.
If indeed the ball joint is screwed into the mounting block it should be fairly easy to replace the ball joint with a small CNC’d thing that houses a 1/4" thread.
My homemade version of this is printed in two independent parts where the geometry locks them into the back of the keon. I did not manage to make it springloaded. In the attached photos you can see it mounted as well as the individual parts. In the bottom of the images is the end of a manfrotto 244n arm with a 143bkt camera bracket. My printed adapter has a cylinder that locks into the bracket, ensuring that the keon does not rotate in the 1/4" thread.
