FWIW - It appears the shaping of the replica Stock, in the area around the side-plate, is a little off.

Whig: You will want to make sure the rear of plate, #1631, is not in contact with the Stock, before shooting.

Otherwise, the small section of wood, between the side-plate and cut-off, is likely to 'shear off', like it did on your original early Stock.

(Note arrow on lower picture indicating apparent contact).

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