Having been a friend of Don King, maker in the 60's,70's and 80's.
I can maybe shed a little light on Don's soldering techniques. He would fit the parts to be joined to a tight slip fit, flux them, using thin flat silver solder ( not wire)
between the joints he would put the pieces together sometimes using clamps. Before applying heat he would use a grease pencil and mark a line around the joint to be solder. Applying heat the solder would run to the mark and not any further. Hardly ever seen a solder line.
Miss Molly great rifle, love the bean style.
Videos are great as I collect the old style music.
Carney