My boat came with a 100% jib with jib hanks to hank it to the headstay. It was nearly immediately converted to a 150% roller furling genoa. As a result, I have an essentially new 100% jib that I'd like to use when it's blowing hard or when I'm sailing alone. Is it possible to convert a jib with Jib hanks to roller furling? Is it worth it?
Absolutely take it to the sailmaker and have it taped up so you have a second, smaller jib to use. You need to know the full hoist length of your forestay with the roller furling rear in place, as the sailmaker should add a leader to the head of the 100% so the halyard raises close to fullhoist (actually the same hieght that works well on the 150%). The leader needs to be taped also.
Taping the sail is not too expensive.
However, if you want to leave the small jib on the furler frequently, you should have the sailmaker add a UV sheild to the foot and luff, which can get expensive...