I remember doing my Coastal kipper practical---the instructor/examiner explained that the boat was well equipped with radar and GPs and he would fail us if we didn't use them. He also explained that he could, at any time, turn everything off, and if we couldn't cope with that then it would also...
I have a very elderly Waeco portable compressor driven portable fridge/feezer coole box. They changed their name to Dometic some six years ago. It has been totally reliable and has a very low power consumption. Probably a bit more expensive than the one you are looking at, but well worth a look
Having previously owned a Southerly 28 for many years I found that the trick to successfully reversing was to give the engine a lengthy burst of maximum revs in reverse. Once you had got some reverse water flow over the rudder things became quite easy. Gentle prods of the throttle in reverse...
Just checked on The Medway Yacht Club website---they show something called "Winter berthing membership" at a cost of £130.00 so it would appear that they still offer the service to non-members. You will have to pay extra for the lift each way on their travel hoist and also for the actual winter...
Medway Yacht Club used to have a facility for non-members to have their boats lifted and stored over winter. From memory they had a "temporary member" arrangement that enabled you to use their facilities whilst your boat was over-wintered. Might be with enquiring if they still provide that service .
Best hand bearing compass I have is on my iPhone. Not only does it show you the compass but also shows your Lat/Long, it also shows you your elevation. I agree the latter is not a lot of use on a boat
I found that the addition of a packet of wallpaper paste to the Oxalic mixture kept the solution on the hull longer. It still pressure washes off just fine.