I dipped push pins. Thicker ones in ca and inserted them in the balsa. I then started the kevlar on one and wrapped the middle then tied it off on the last pin. You can do top and bottom wires. Kevlar thread soaks ca so I centered the rudder and made sure I had propper tension then a drop of ca on the thread at the pins and it is soid like a rock. kevlar thread does not strech so it is super rigid super light and strong as it gets. I did this with all my mods at the same time so I dont know the amount this individual thing added but my rudder is way more precise than it was. Im also not worried about it breaking off any second when I do snaps.