modification - centreboard raising .mechanism

Robert Ayliffe, builder of Clancy, plans agent with a history of design collaboration with designer Bruce Kirby, suggested I modifiy the centreboard winching system. 
The current system has a cable going forward from the 'board, through a block, running aft to a block which directs the cable  onto a winch nounted on the mizzen tabernacle. Robert's issue is with the winch position, just below the mainsheet tackle. 
The new system directs the cable vertically through the deck, through a block directly to the halyard winch. 
The only wrinkle is that a compression post is needed to withstand the compression strain. 
This evening I bought some dyneema, a halyard exit block and rope clutch. I have the compression post already underway, using a section of a Mirror dinghy boom.

See how we go ')
 

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