The Fred Randell Tigercat was in 1961 and it put an end to the single engine low speed technique.
The "both engines running on low" rule put an end to win-with-a-twin.
According to the article, he didn't even throttle the inboard engine but used 7 ounces of tip weight.
I got pretty deep into building one with two OS25's, but couldn't get them both to idle well enough to complete the job.
NO throttles is A LOT easier that TWO throttles that work all the time, especially on 3-line control.