I wanted to add wheels to my hammock so I could easily move it into shade throughout the day. Some openscad later and came up with this little bracket. Uses a clevis pin for an axle, and just pops into the metal tube feet of the hammock.
Haha, this was just printed on my voron. Although a giant garage printer would be pretty cool.
I printed this in ASA to help with the heat. No scientific stress testing but I've been using it for a week or so without issue. And with this print orientation it should be strong enough, since the forces are perpendicular to the layer lines. If it does break, the hammock would drop maybe an inch so I'm not worried.