In front of the hinge, not in back, Stephen.
The "gap face" or block undercut is what I use on all pull trees these days.
I used to just cut a "German", the vertical cut in front and below the hinge, but last year I had a talk with Jerry B. about hinges and how a lot of falling trees is simply knowing how fibers bend on different species, so on his recommendation ( he just said that in his experience, the block facecut , busted out with an axe so no fibers are cut through, gave the strongest, most bendable hinge.)
Since I am perfectly willing to listen and learn when those I consider my betters in the trade speak, I implemented his way as soon as I got home.
Only I don't bust it out with an axe, since that would be a major undertaking on the hardwoods I primarily work in ( but I totally see the reason for doing it, whenever possible!).
The verdict is that it works quite a bit better than just cutting a German, so I'll stick with it.
And Martin, the apprentice , is going to blow some minds when he goes back to forestry school and they get to pulling trees
