Thank you everyone, Yes, I am very lucky having Alice, I really couldn't manage without her.
This keel is a bit of an experiment as far as I am concerned. Having a shallow box section, the weight is spread over the whole length. Consequently the pendulum effect of a bulb and fin will be lacking. Whether this will matter in the overall performance of the boat I do not know. She is fairly beamy for her length, which of course, makes her stiffer, but I think it's going to be a question of 'we'll find out on the day' and I wish that day could come pretty soon!