[QUOTE=My point being that in the second demonstration the maneuver could have been achieved with two opposite turns and the use of the sideslip card extraneous. The first demonstration gives the sideslip card a tactical use.[/QUOTE]

Not necessarily extraneous ... the two-turn opposite process not only slows the process down but can also cause potential exposure for rake. The sideslip tactic would definitely be preferred.

Let me just say that if a picture is worth a thousand words, you've provided us with a full training manual!!!