That’s a nifty paddle setup! You don’t have any issue with the blades twisting? I know Alpacka used to sell a trekking pole paddle at one point.
The DIY Ultralight is pretty amazing given it’s much lighter than the Klymit LWD, same weight as the Supai but it’s a full-sized boat whereas the other two are quite small. Of course it is made of much lighter materials, I can attest that it is easy to damage.
I’m using mine again this weekend for an extremely long day hike that starts with a river crossing. 3 of us will be ferrying back and forth.