This is the definitive method, very thoughtfully laid out, step by step. Overworking the idea? I don't think so; a well sharpened parting, or V, tool is the most useful tool for decorative carving. Dull, and you might be better off with a dremel.
I admit, I didn't study the whole piece, but scanned it. I didn't see where he uses a strop for the inside of the vee. That would be the only addition to his tutorial. I make one to fit the tool, of either hardwood or brass, and charge it with diamond lapping compound. this trues the inner faces of the Vee, and removes any burrs.
His point of starting with A GOOD TOOL IN THE BEGINNING is most crucial. Look at the end of the vee before you buy one. A large radius at the bottom of the vee is pointless(
!!), a tool with uneven lip thickness must, and can be, corrected. But if you have a dozen tools to paw thru, pick out the best one.