Anthony Fung

Hi all I also have some play between the post and the stage which is causing movement in my footage. The collar with 5 allen screws is tight and secure with no movement relative to the post. There is however movement between the collar and the stage. I am thinking there must be screws that fasten the stage to the collar and those need to be tightened. However I can't access these screws. Can someone share their knowledge on how to gain access to these screws.