That's an interesting idea with the karate belts. I have chair I just redid, a side of the road find, & after repadding & recovering the plywood chair bottom, I have realized it is possibly the most uncomfortable chair I have ever sat on in my life. Which really sucks, because it's NaNoWriMo & that's my writing chair.
I have been thinking about nixing the plywood & doing webbing. There is no where around here that sells it, but I have been thinking about using duct tape. I've read in a few places where it is recommended for fixing those strappy lawn chairs.
Also, I use Google Chrome too & after reading all the posts & click the German link, what did I say when I saw it? "Aw, I can't read it; it's in German." Doh!
Then I remembered the translator.