Having made a bunch of solid plugs and considered making the same design as that sliding wedge type, I can say that I'll not likely make the sliding wedge type for myself. The solid plugs are just too easy to make. Frankly, I think the wedges would be time consuming to make. An alternative would be to make it one piece and cut it at the angle with either a thin slitting saw in a mill or wire EDM.
Right now, I'm wondering how much trouble it's going to be to remove a dent my brother-in-law put in the choke area of a 20g sxs I gave him. He leaned it against the truck and it fell over on my dogs SS water bowl. Sheeesh!
