I currently own a 1970's wooden Folkboat and I have a problem. I want to lift the boat above it's storage cradle to a height of about 6 inches so that I can get to the top of the ballast keel to prepare/seal it. I also want to be able to do the same to the bottom of the keelson. I am toying with building a heavy duty wooden frame within (but separate from) the cradle she's resting on (on here keel), undoing the keelbolt nuts and then jacking the frame up, inch by inch, in stages - chocking it as I go.
Anyone done this before? Anyone got any tips/hints?