I’m a big proponent of using a simple flat blade shaver bit on a drill....but the Pistol does intrigue me because of the reduction in rotating weight combined with the blade design.
I’ve been around dirt track racing my entire life. I’ve built cars, scaled them, set them up, etc. One area where you can gain a huge advantage is in regards to rotating weight. For every pound of rotating weight you eliminate it is like dropping 10 pounds of dead weight. When we first started focusing on this area by runninglighter rims, hubs, axles, etc. there was a noticeable difference in performance as well as a significant improvement in the longevity of drive train components. Clutch packs were not wearing out as fast, rear end gears lasted longer, and so on. Anyway....in theory the same principle would apply to reducing rotating weight with an auger as it would put less strain on the drill.