I bought a used asymmetric spinnaker for $300, about 10% of what a new one costs. A large rip in the sail had been repaired with sail tape, but I decided to replace the ripped panel. I started by cutting out the panel along the seam.
I removed the residue from the tape using this 3M product … it worked perfectly.
I then used the cut out panel as a template to mark the new fabric with chalk. One of the straight edges of the new 1.5 oz nylon fabric was attached to one of the edges of the sail using double-sided basting tape, then the other side was attached with basting tape using the chalk outline as a guide. The panel was sewn on using a zig-zag stitch with UV-resistant polyester V-69 thread and a Sailrite Ultrafeed LSZ machine (on the table in the background).
Once a single set of stitches were applied, the extra material was cut away and a second set of stitches were applies. A few other holes were also patched.
While the sail is not perfect, I will use it to decided if an asymmetric spinnaker is my preferred downwind solution. If it is, I will order another spinnaker and keep this one as a backup.