Here's a little project that I just completed yesterday that my 210EXT was involved with.
I'm calling it an Outdoor Smoke-Break Bench. I got the wood and rebar for free from a neighbor.
So, I decided to go down the proverbial rabbit hole and make a small bench for a neighboring couple to use at my apartment complex. I've teased them once or twice that they could use something to sit on when they come out to smoke, by saying that they look like smoking fiends while they're just standing at their front porch.
Anyway, I was able to get the limited amount of reclaimed material to get the form to follow the function pretty well, as they might even both be able to fit on the bench at times. One of them is in the process of quitting, though.
Otherwise, the structure is very rigid, stable, level, and doesn't teeter. I did put some 1//4" rubber matting at the footers to help conform to irregular terrain.