The other thread is messy, and people are responding without reading the thread. Basically the OP did a great job but had to multiple times tell kids there are better alternatives.
After research i found this site to be the most helpful:
But the question becomes shock cord or surgical tubing:
3/8 inch (good, thicker the better) @ 50ft = $39.95.
This would be all you need, 3 strands @ 16 ft each or 4 strands @ 12 feet each
"Shock cord (bungee) is a longer-lasting and more durable alternative to
surgical tubing because it is rot-proof, waterproof, and resistant to
mold, mildew and UV. Shock cord is constructed of continuous rubber
strands with a Nylon abrasion-resistant braided jacket, suitable for
marine applications. Stretches 100% of its original length; a piece
12-inch long will stretch to 24-inch."
This seems exactly what we need. Only problem is at max available, 3/16 of an inch is super thin. Thats half the size of the tubing.
3/16 @ 100ft = $38.95
You would need 6 strands of this to equal 3 strands of the surgical tubing (so price point is dead accurate).
6 strands of a 100ft roll = 16 ft each. Once you braid this though it will drop in length marginally, i am going to assume to 9-10 ft (6 strands means alot more weaving).
I found this link to show how to braid 6 strands. It looks fairly simple once you get the hang of it.
Once you braid 6 strands at 3/16each your final bungee will have a diameter of just over 1 inch.
I think i am going to buy the shock cord system but my question to you guys is this: How stretchy is the tubing system? It poses alot less work to implement, and the less weaving (less strands) mean you get more length for your money.
(for some reason my bold/italics/underline/add link, etc toolbar isn't working, my bad)