Rigid hot table bracket for HyperCube Evolution

The main goal is to get the most rigid mount for a hot bed on the table frame.

At first, I did not quite correctly understand how to use the HyperCube size calculator. Because of this, I ordered a hot bed 310x310 with holes 240x240.
But in the end I made, probably, the best way to fix a hot bed to the table frame, which can be implemented in my setup.

Now I have a hot bed mounted on M4 screws with a normal thread pitch (0.7 mm). On the handle made 70 marks, corresponding to the movement