The legs' length is adjustable, each leg is connected to the desk by means of a plate with 4 screws on the perimeter. I want to lower the table's front legs so the table becomes slanted. I would like to be able to adjust the slant degree so placing wedges between the legs and the desk does not help me. I've been thinking on adding some kind of bearing between the desk and the legs but haven't found any bearing that would enable me to do that. Any suggestions?