Thank you , I had a Eureka moment . Will try it tomorrow.

:: If it's like mine, the cylinders on each side are
:: threaded onto a tube that goes through the mast.
::
:: Move the rod exiting a cylinders so that the rod is
:: perpendicular to the cylinder. The cylinders can then be
:: rotated around the rod and unscrewed from the threaded
:: tube.
::
:: When reattaching, do not tighten the cylinders tight
:: against the mast. Leave a small amount of play so the
:: cylinders can rotate with the rod.
::
::
:: :: I lowered my mast and found an attachment of rod rigging
:: :: to the mast very puzzling .How do one goes about
:: :: removing it? Cylinder shape outside through the mast.
:: :: Advice how to proceed please