I won't be making any change until I start work on the OOB's next fall . Maybe someone will come up with something definitive by then.
This does, however, point out why OOB work is a thankless PITA. The reason the same 105mm gun stays in service in the French OOB from 1946-2020 is because there is no info to be found. We ASSUME it must be wrong because it would seem a ridiculously long service life even if the nation were third world but there's nothing to be found so we either go with the best we have or leave it until we find something better or try an "educated guess" knowing full well all three options are probably wrong and at some point in the future someone will show up asking why this is still in service when the last one was used 1989 like EVERYBODY knew that.
Don