3 Points leveling bed support

Tired of the four point difficult to adjust, I design very simple parts to be use with 12mm Diameter aluminium RC Heli Tail Boom.
I use also a carbon fiber plate 1.5mm thick so the entire bed is very light and rigid.
It is made to work with 10mm rod (LM10UU) and a Trapezoidal screw 1mm pitch
My machine is an H-Bot derivated from a Sakura Cube.
The lenght of the aluminium tube is 235mm, so you can get one lenght of 500mm for 1.99$.