I've barberchaired an Alder that was butted up that same way, which controlled it plenty, it still hinged, and fell without incident, with me plenty out of the way. IIRC, my hinge was in front of the pith, where I believe it split. Gerry, you've mentioned very deep cutting of barberchair prone trees. I wonder if this gets the hinge deeper than the pith, at least in most cases.
I've been wanting to start a barberchair thread, but haven't gone down that rabbit hole, yet.