Attach this activator to your frame with two M3 screws + two M3 nuts and deploy your bed leveling probe in a convenient way. The activator goes out just between the belts, exactly in the middle without interfering.
Works great for me when I have an extra mounted cooling fan on the end effector plate.
Fits all 15x15 mm extruded square beams
https://www.youtube.com/watch?v=dyz7ieiXVA0&feature=youtu.be