The bilge keel thread got me thinking, are beaching legs a viable proposition for a fin keeler with a spade rudder, or would they just be a prelude to expensive disaster?
I use beaching legs on my etap with a lifting keel. They wouldn't be my choice if I was on a drying mooring but for occasional use on good ground they are fine. I have certainly never had a problem but with the keel wound up I only draw 900mm. I wouldn't fancy using them with a deep keel.
Can you dry out against piles happily, or do you creep about the boat when the water isn't there? Trusting that your deck cleats will stop you nosediving into the gravel/concrete/scrubbing grid. Admittedly nosediving is better than landing on the rudder.
Having owned gert big wooden floaty things down in Cornywall Jimi they are fine if you have a long keel and the ground is 'ard like in lots of little drying harbours. They are about as much use as a one legged man at an arse kicking contest on a short fin keeled boat on soft mud. "Orses fer courses m'dear. Stick to your short fat hairy ones I should.....
I'm not sure if they are still there, but around 10 years ago there used to be a pair of Sigma 33s in Ramsey harbour, which dries, on yacht legs on fore-and-aft moorings. They were there for at least three or four years.
Our Sadler is the shallow fin variety, so the keel is longer than it is tall. We have dried many times on legs, on a wide variety of bottoms, although this one was fairly hard sand, Belle Ile off southern Brittany.
However, many Sadlers were fitted with legs on initial build, including many of the deep fin boats.
I suggest you speak to Yacht Legs to see whether they have reservations over keel type. In the past they claimed that any boat could be fitted with them but their website is not very informative.
The Sadler has a full-length skeg, which helps calm the nerves. Most decent cruisers are stable on their keels, but may leave the rudder vulnerable on an uneven bottom.
That was my point about the Sigma 33s, which as far as I know have spade rudders. Rudders on the deep-keel Sadlers would be well clear of the bottom and I suspect that the same applies to Sigmas. Many deep fin boats seem to sit quite well on the keel and legs only.