Hello Neil,
If you raise your keel by running a line back to a cockpit winch, read on. If not, please ignore.
On our Parker 275, yours truly had the pleasure of cranking 100 turns on the winch to get the keep up each time we returned to our berth. It took me three burst of 33, with rests inbetween. For ultimate convenience, we eventually fitted an electic motor in the forepeak, getting the kit from Parker's.
Before this, we managed to find the very last widget in the country that may help you. It is a compact gearbox that sits on top of your winch and accepts a portable electric drill in one of two hex spindles, according to the ratio you choose. It sounds a bit strange but the whoe assembly is a work of art, with highest quality construction. It cost a pretty penny but I have just remembered that it is sitting idle in our garage.
If you want to give it a try, please let me know. If it does what you want, it is for sale. If you are not interested, no problem but thank you for reminding me to put it on the for sale pages of our web site 🙂.
Cheers-Ken
Ken Surplice