Nice job but you left out my favorite reamer for estate pipes, the T-handled Pip-net. It's also often sold under the Castleford logo. It consists of four different sized reamers that are cylindrical with rounded bottoms each of which has four cutting edges and a T-shaped handle that holds them. It does an excellent job of reaming the bottom of the bowl without resorting to a knife. The system has only two drawbacks. First, it isn't much help for tapered bowls. Second, you only have four choices for final chamber diameter, a fairly minor problem since one of the four should be acceptable for nearly any pipe.
Overall, it's my first choice for estate pipes. With just a little practice it gives a smooth even job every time. For general maintenance of my pipes I do use the Buttner and Senior, but for newly acquired estate pipes it's hard to beat the Pip-net.