After multiple tries at getting the trellises set up in 2011 (read here), we decided to let go of the biodegradable twine and switch to a more permanent solution i.e. a coated galvanized wire. The coating help us set up the trellis fairly quickly (unlike the biodegradable twine that was super difficult to thread through the eye hooks). Hopefully, even if the coating weathers off, the galvanized wires hold up for a few years. Considering how expensive they are, they better last.