Hi All
Thanks Inkmark for the info, very useful. I will increase the rudder area as you suggest and I can see that it is very much a light weather boat. The rig on mine will be a bit different to the original , as I have to make new sails anyway, as the old ones had nearly rotted away.
I had to go to the sailmakers this morning to sort out some repairs to the sails on the full size yacht I sail on and I managed to scrounge some white spinnaker fabric for the Mistral's new sails. They simply cut a chunk off the roll of my chosen fabric, which was good of them.
My full size sailing takes up a lot time in the summer months, so it may be a few weeks before I get round to doing any more work to the Mistral, but will add some final completion photo's when I do.
Thanks for the help.
Victor