Reg, I really like that felling bar,,,, it looks well thought out, and I will admit I maybe only see about a 1/3 of it's design features.
Harbor Freight sells a crow-bar with an extra bar welded to the working end instead of the typical crowbar hook. As mentioned, for removing nails.
Trees (less then a foot dia) that can be controlled with a 2 foot or less bar can just as easily be pushed in the direction you want them to go, but I find the bar handy on side hills as getting tall enough is sometime an issue, but your right there with a little bar.
Here is another method, sort of fun....
when a little tree has a lean against the the way you want it to go, bore cut the tree in the direction you want it to go.
On the side you want it to fall to, cut our notch vee'ed right into the bore cut, about 1/3 the way.
Go back to the other side and make your back cut right down the bore cut, leave your hinge.
If you see the tree move the slightest into the cut, or just as the tree try to pinch the bar in the back cut, perfect!
Now take a wedge and drive it into the bore cut , a 12" wedge will work in an 8" tree, start smacking it and watch that tree just take off in the way you want it to fall.
I would bet your lunch pail that most little trees, greener the better, will hit right were you want it to. And nothing seem worst then when the little ones got you lip.
