Nice, Chris! Simple, yet very well done. I don't have #125 in front of me, but when I first saw the photos you posted, it screamed Virginia to me. Particularly, Rockbridge or Augusta school. The architecture in general (longer wrist specifically), side panels, side plate, are all characteristics of those schools. Also, and I don't know if you did this on purpose, but the barrel pin location (forward, near the rear ram rod pipe) is also something that is commonly seen in the Valley and the two mentioned schools. Shape of the wood box is also something you'd see in the area. I'd say the same thing about the carving, both behind the cheek, and around the tang. Also, the stab cuts you described are found on both Rockbridge & Augusta school pieces. Just my opinion, and whether Berks or VA, nicely done rifle...
I also hear ya about building what you want, when you want to build it.... Thanks for sharing,
Ed