Some while ago I suggested fitting Mirror rig to my Miracle because I prefer Gunter to Bermudian. (yes I know less sail area etc.) Somebody wrote that I would have to move the mast backwards. I wonder why, I would have thought the center of effort was the same. Any suggestions?
I think less area on a miracle is a good idea too. Whoever it was was probably thinking of the quite large miracle main sail. You could do an experiment with card cutouts of the sail plans to arrive at comparative centres of effort but even then it would be worth just trying your new rig in the same position. - it might not make much difference.