Awesome work FredC. We're at our cabin right now but I'm anxious to get home to measure the barrel and stock width and depth from 12.5" out from the receiver. Direct attachment of the sling swivel to the barrel band mount screw ideally would provide the most strength, but appears to cause difficulty with design to accommodate that.

If the swivel stud can be installed relatively close to the the barrel band, wouldn't the rigidity obtained by the stock's attachment to the barrel band provide adequate strength to prevent stock fracture?

THANKS to you for your interest, expertise, and work on this issue