I considered building a frog for this, and may yet, however for now the Sam Brown stud will allow for simple sheath retention between the belt and body, which (not being a professional) I believe is an acceptable no frills simple design option. (?) The blade is long enough and the fit tight enough that there is no chance of the blade falling out of the sheath. Another option I think would simple be to make a separate single piece thong that wraps around the back side of the handle and hooks onto the Stud on both ends, which you have probably also seen.
I have Paul's DVD's, and they are a priceless resource which I encourage everyone to purchase if they are serious about learning to make a decent knife sheath. I am very grateful for guys like Paul who share their amazing talents so generously.
Thanks for the input as I have much to learn!!