Band tying line

This one Waxed band tying twine.

That is a very nice band tying job there.
That tying approach will make it a lot easier to replace wishbones
Nice idea

This is an example of waxed nylon whipping line that is not flattened and which IMO is not suitable for this application. The reason I don't like it is because it will cut into the rubber band and your hands when pulled as hard as it needs to be pulled to make the constrictor knot. Actually I use the double constrictor knot and then two more constrictor knots.

Dan I got my flat twine 30 years ago from a shoe repair, I believe saddle shops also carry it. I'm going to will
mine to my kid's kids.;)
Cheers, Don

For what it's worth, I use regular nylon line that's a bit rough exterior, no wax. One constrictor knot... never had one fail yet.

I use 100# dacron and have not fail me yet. It comes in black but I ran out of it so been using the regular white/green since I have like 500 yards of it. Most tackle shop that cater to of offshore fishing carry the black stuff since it's used to make wind-on leaders....:)