Ran it twice. Qualified at 56.33, clean run (par 58). The one-button rhythm clicked fast for me: release around 30, re-hold around 70, and the debt cliff never bit. The 100/200/300 splits are the bit that makes me want one more lap. One cold-start worry: a first-timer holds from the gun, hits empty around 7-10s, and eats the stumble before the tank has taught them anything. Making that first stumble cheaper (or starting the tank visibly low) might teach the rule before it punishes. 'You found a rhythm' is a great end line.
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