Board support for PXIe card in a normal PC

When we are testing our PXIe adaptors (https://store.sundance.com/product/smt580/ and https://store.sundance.com/product/pxie-pcie8/) we have noticed that there's no easy way of supporting the cards so they don't droop. You can pack then out with "things", but when you have a 3D printer, why settle for "things".

I knocked up this support to keep the board flat during testing / use.

Hope you like it.