Magnetic bed bracket Hypercube evolution

I'm using 42x42 cm heated bed for my Hypercube evolution. Because of the large size the aluminium bed plate get warped badly due to heating and cooling . Aspecially when printed ASA, ABS, Nylon (100 degrees or more). Original brackets don't allow for expending and contracting when bed is heated. So I decided to design bed mount which will solve this problem.I was inspired by Ratrig V-Core 3. Using the magnets and ball compensate the movement of the bed plate when heated.For this mod you will nee