The Eidolon uses threaded posts with smooth heads - no slots. To remove a claw, wedge, or strut, you have to try to hold the post with your finger tip and keep it from turning as you back out the screw. Is there anything that can be pressed against the head of the post with a fingertip to help keep it from spinning? Something "grippy" like rubber or a piece of a thin silicone mat? Thanks.