Works great on regular trees. If you have a limb sticking up you want to buck up too, mark it until it gets too small, and cut it where it hangs. I imagine it is easier than trying to roll a mingo up a tree full of branches.
I don't have instructions, and the web site in the video doesn't exist. It is as simple as it looks. 1" PVC, 1 tee, 3 caps. I didn't glue one of the caps, that is where I fill it with chalk. The cap with the black tape is the unglued one. I tap it back on until I get the 16" I want. Dry fit and measure before you glue. You can always trim the unglued end if it is too long. I used a hacksaw to cut a slot in the cap on one end. Does not need to be big. Sometimes gets gummed up in wet conditions, clear it with your knife. Nothing keep the chalk from coming out when you aren't using it, but it doesn't just leak out, maybe a little ends up on the shelf I keep it on, or in the back of the truck, no big deal. Don't put it in your wife's car. A bottle of chalk ought to last at least a season or two.
So simple, so easy, so cheap.
edit: and it is a hell of a lot better than carrying a 16" stick, or finding out the big oak log you brought in for the night is 1/2" too long.
