That's a good idea, mei Liaba, and I haven't ruled anything out yet. I can still use a piece of wire, with the kit springs. Do you have an idea what gauge to look for? I've used some 3/32" Plastruct tubing for the new fittings on the knees, to cover where I've drilled out the old material. That's the outside diameter, the inside is probably about 1/32". So, I'll need a string with a gauge somewhere around 3/32" or a little smaller.