I am looking for a copy of TOM COLVINS booklet on making sails for a junk rig.

I used it for making the sails for 35' wood yawl  I made in Kenya about 10 years ago.

I have misplaced my copy and I now need it to make sails for a 33' Trimaran now nearing completion in Somerset--I plan a carbon fibre mast and would be obliged if any member with any knowlege in this area could share his/her knowledgewith me.