Do you wobble too?

I just got my Orion slow motion adapter and had a chance to try it out last night. After asking a couple of weeks ago, it sounded like an OK addition to the HD-F2 tripod for my ST80, so I ordered it. My first impression is that it sure makes the scope wobble and shake. Am I not tightening down enough? (Don't want to break it right away.) Does anyone else use this thing? Any ideas?

Thanks,
Charlie