And so back to asking this learned forum.
The pictures attached show the tangs on the mast
. I need to disassemble them but I can't figure them out. The screw at the top seems to release the aluminium cover, but this is still retained by the plate which seems to be the end of the pin that goes into the mast
. The top end of the plate is bent into a recess on the cover which stops it from rotating. I didn't want to force it out of the recess in fear of breaking something.
Any ideas? Thanks in advance.