I have a framed ledge and braced hardwood front door. The ledge is
the
ideal height for fitting a mortice lock (just above a third of the
way
up the door), but that will mean cutting into the wedged tenons
fixing
the ledge. It's a hefty frame (100x56), and a very hefty ledge
(180x56).
Would I be better off just fitting to the frame slightly above or
below
the ledge?