Update: M4.4 just came in. My nightly prayer: "Please let there be at least 6's before these guys wake up." I'm very absolute-biblical, you know, at least about OK, which seems appropriate. :)
Update2: Upgraded to an M4.5. New solution gives it nearly pure shear along the megathrust, with some thrust.
Update3: Ah, too much thrust! They knocked it down to 4.1