David, those Gossamer Gear clips appear to be common molle clips for cylindrical objects. They are about $4 on Amazon.com but, yeah, $30+ on Amazon.ca. The trick is finding a Canadian vendor. Here’s one: https://www.amazon.ca/TECKEEN-Tactical-Fastener-One-Handed-Convenient/dp/B0BX25WFM2/
DWR D: I agree that Jim Pflugrath’s vid looks complex and odd, but he has other vids showing how easy the thing is to deploy (just a couple of tugs and a clip), as well as solid wind performance. He addresses the issue about wind lifting the umbrella as well. It appears to be robustly effective. That said, I probably won’t build one because it looks like a weekend-long project. That seems like a lot of effort when I don’t even know if I am going to like using an umbrella.
I will try both of those clip suggestions, though. Maybe I was just doing it wrong.
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