foil size
I had a Snapfurl on my previous boat, great furler much better than the CDI IMHO, however they have a slight problem with the size of slot, it is not standard, I think it is a #5 instead of a #6. A "normal" #5 foil will probably be too big, the size is very critical, the sail loft must be familiar with this furler to make a sail that will go up and down easily. When I contacted Schaefer regarding it they suggested dealing with Sailcare as they sell a lot of their product and should know what to do. Schaefer have a set of specifications on their web site explaining what the max sail dimension can be for these furlers. I have a seen sails damaged because they were just a bit too big. I had a hank-on storm sail I wanted to have converted to use on the Snapfurl, none of the local sail lofts could get the right sized foil to fit the furler slot. I gave up and sold the sail. The genoa I had was made by Somerset Sails and worked perfect in that furler.
good luck, Bob