I'm curious if anyone has designed something to be compact, and quick to put up/take down. I have a need for a basic clothes hanging rack, with an emphasis on compact portability (e.g. able to fit in a suitcase or duffel bag) and not requiring tools to quickly put up/take down. I'm thinking 180 connections (to permit 2 shorter tubes to be connected to make a taller vertical), and possibly thumb screws to tighten the connections. The two parts I'm not seeing available are the 180 connector (except for a post below, which seems to require threaded tubes), and finger-tightenable screws.