That cracked web is not an uncommon occurrence with Foxes. The example in the pic above has more serious damage than the just the split. A substantial and very important chunk of wood is completely missing, perhaps as a consequence of continuous shooting after the crack occurred. A good illustration of why not to shoot one that has the slightest play in wood/metal fit.
That somewhat routine repair has been made for decades; in fact, likely while the guns were still being made. At some time during production the factory began to add a metal reinforcement in the form of a "corrugated" joint fastener.
Were I planning on feeding one a steady diet of heavy loads, I'd add reinforcement as a preventive measure...akin to glass bedding the side plates of an LC Smith before cracks develop.
