vacuum robot Vorwerk kobold VR200 / Neato turret extension

A vacuum robot is a great thing and ours is so flat, it can even go under the couch. Unfortunately it won't find its way out and will get stuck, so I had to design an extension to the turret, so the safety switch will tell it to turn around before it gets under the couch.

I know only one other person who owns the same robot and they have the same problem, so it seems like a useful thing.

The turret extension is available for 10mm, 15mm, 25mm and 35mm height, most people will be fine with 1