Graphic card support

To support my GTX1060 and RX480, I design a support refer to a commercial one.
Besides 3D printing parts, you will need:

1. one or more M4 x 6-10 mm screw (depends on how many graphic cards you have)
2. A 12*5 magnet (I use a broken one)

I set a pause at 6 mm height and then put the magnet into to the internal hole.