Just Windsurf - Severne Lockjaw - Boom Head - Troubleshooting

So the troubleshooting/issue are, the Severne Enigma Carbon boom with Lockjaw as shall be stiff and rigid has too much movement in the boom head. Severne claims that: "Yes, all Severne booms with SDM Lockjaw boom head will fit both SDM and RDM masts without an adapter." I will claim that is not truly working, it can of course just be my boom, i don't know. The unstable boom head causes several not wanted properties: 1. The boom head slides down on the RDM mast, always. 2. The boom head rotates to easy on the boom itself, causing a potential for huge movements depending if the outhaul are tight or not. 3. The lockjaw do not have enough leverage to clamp a RDM tight enough into the boom head, causing movement and mast slides. And yes I have tried to put in some extra thickness, but not any good solution as it have to be very rigid and fill the hole clamp. Solution: Change from Race/SDM Cup to Wave/RDM cup. Add some extra thickness on the boom itself. I hope this will give any of you with same issues some ideas how to proceed. PS: I'm only on RDM masts, do not use SDM any more. Chapters: 00:00 Intro and issues 01:26 Test with RDM mast in Race(SDM/RDM) Cup 02:34 Dismantle the boom head 05:34 Add some extra thickness on the boom itself 06:27 Change the boom cup from SDM to RDM 07:10 Mount everything back into place 09:28 Test with RDM mast in Wave/RDM Cup 10:48 Thank you for watching