The Genuine Fanatec table clamp is awful

This 3D printed table attachment is designed to be minimalistic and absolutely rock solid

Also comes with a drilling guide so you can get your holes in the right place

Available in 15 degree tilt (same as official one) or a lower 12 degree tilt. both have the same drill holes so are cross compatible

You will need:
Your T nuts that came with your wheelbase
Four M6x12mm screws
Three M6 screws the thickness of your desk plus 10-15mm (so for a 30mm thick desk you would need a 40-45mm screw)