My main sail size below
Main 16.45 sqm 8.85 9.20 3.54









http://users.accesscomm.ca/gbabish/double.html

My other option is below




you turn the original main sheet upside down and run the sheet across to the mizzen and down but still would have to adjust the traveler

I would have a soft spray dodger either way

I have made a instrument pod Id like to fit on the hatch cover where the original main sheet track is located
So I either make a bridge main sheet track lots of b.o.at. dollars and time
'