Single handed set up

Has anybody rigged main halyard with downhaul, back to the cockpit for single handed sailing? Some idea of routing and pictures would be great.

Well this silly idiot has re-read the manual and understands how to do it now. However, if anybody has ideas on routing under the spray hood, or keeping this semi-water tight, your thoughts would be appreciated.

I have 20mm conduit (with my lines through them) through the lower part of the spray hood. I have wooden blocks that stop water passing under the spreyhood too. These tubes protrude forwards by an inch or so and stop most water coming past. I will get a photo when I am on board next.