What is interesting is that in the mid 1950's when George Aldrich developed the pattern that we essentially still fly today (as well as the FAI F2B pattern), some maneuvers of the then new to the official pattern appeared in that April 1954 Air Trails article. George had some input to some of those diagrams. Whether or not he actually used that article for what he chose to include in the modern pattern is not know. But there is some evidence that he used ideas from that magazine.
I think a good test for how well a stunt ship performs is to do the square four leaf clover. Another one that is difficult for our modern stunt ships (excluding good 1/2A stunt ships and combat jobs) is the thing shown as a "cotter pin" or what I would rather call a mushroom. From normal level flight, make a 90 degree square inside turn to a vertical climb. When the model reaches the 45 degree elevation, do another 90 degree square inside turn to inverted but then "instantly perform an outside 45 degree diameter (or smaller) loop with the top above the top of the circle (90 degrees) until the model reaches the point where that loop started (inverted and at that 45 degree elevation), then instantly stop that outside loop and make a 90 degree inside square corner, diving directly to the ground, then another 90 degree inside square corner, pulling out at normal level flight. If you think you are getting pretty good and/or your airplane is flying well, try this one. If you start to even cone close to getting the right shape, you are equally close to loosing your airplane.