Hi Simon,
I own Parker 31 White Light which is moored just up the river from you at Rossiters in Christchurch - we exchanged greetings a couple of times when we came past your mooring earlier in the year ! As you had no visible boat name I was not sure which P31 you have, but now all is clear.
We have owned White Light for 11 years, and done numerous improvements and modifications over that period. I would be happy to meet up some time and share experiences, and/or exchange information via email if there is anything I can help with.
On the issues you posted about:
-I resealed all our windows a couple of years ago, which already had the aluminium frames, so whilst very labour intensive this did not need many materials (just some seals and sealant). All now very waterproof which is a great improvement.
-spinnaker pole downhaul is fairly simple, sorry I don't have photos, and here is an explanation:
Ours has a block/pulley which is shackled onto eye in middle of foredeck. The snap shackle at end of rope clips on to eye in middle of wire running from end to end of spinnaker pole, then runs through the pulley, through the inner jib sheet lead (on top of coachroof by heads window) and then with other ropes through the deck organisers/leads into the outside clutch on port side. I have seen similar arrangements with a 2:1 ratio at the pole end, though I don't think this is really necessary, as the loads are not that great.
-graphics - I replaced the tape on side of coachroof 7 years ago, using material from SAC Graphics.
-sprayhood - thought about replacing this a few years ago, but seemed very expensive so just cleaned up the existing one and kept it going!
-fridge - ours only had a coldbox, so I increased the insulation and installed an electric compressor which fits easily under the sink, and provides reasonable cold running at around 2 amps.
Good luck, and happy to exchange further ideas.
Francis