Actually pulled a rib today, just one. I was surprised to find two steel tacks and one steel nail holding it to the inwale, just like Stelmok and Thurlow described in their description of restoring the Gerrish. I didn't dare pull the larger steel nail for fear of splintering the mahogany inwale and snipped it off flush. Found it challenging to trace the taper of the old broken rib to the new flat stock. Appears to be a slightly asymmetrical taper between fore and aft.