Hi Fred,
I have a wing keel, so the cradle must be made for it. my lift is a older high tide 10,000 lb and high tide was a pain to work with.... I gave them the drawing straight from Catalina (818 884 7700) exactly what is needed... but high tide was very hard to work with.... in hind sight i should have just bought a larger lift but then i would have bought a bigger boat... larger lift, bigger boat... oh... we all know where this goes...... As it stands i lift the boat out most of the time and really like the option, especially when i am up north in summer.... all the best, brian