One can also use a 2ton jack to raise boat but still need the trailer blocking aft.
Dave
Three Gypsies wrote:On my 2000 X we had to have the boat lifted off the trailer in a sling . Ours was rope all the way to the keel . It passed thru the keel hole and was knotted .
Knowing what I know now , I think it would be easy enough to replace it under water .
Feed the line thru , then pass it thru the hole in the keel , bring it to the surface and knot it , pull it tight .