FWIW, I had John in PA reseal my 124 with the Maccari full power kit.
I would recommend both to anyone.
I just sent my 124D pictured above to him along with a Maccari spring and seal.
I said I liked the shot cycle of the rifle and would probably leave it at the 9fpe it was shooting but the rifle was in such nice condition it bothered me it wasn't to factory spec.
