Braxton's quickie for the day...
Email question: On my last stim, it felt as if my ejaculation was held back. I was almost maxed out on power. Shouldn't that make the ejaculation stronger?
Welcome to one of the many paradoxes of stimming. Ejaculation depends on strong contractions. When you are near maximum intensity, there's good potential for the signal to disrupt those ejaculatory contractions. This would be consistent with what you felt.
Stimming with too much power is a classic beginner mistake, and sadly enough, some beginners stay with maximum power, much to the detriment of the quality of their stimming experience.