It was not my intent to make anyone think the mushroom drive is 'OK.' To be clear, I don't believe in magic. The ST Universe is always represented as 'reality based,' though the 'science' certainly has never been rigorous. But a thing that is explainable as magic much more aptly than any claim of scientific basis? Violates reality, I'm afraid. I've edited my previous post to hopefully make it a little clearer that I was more aiming to throw stones at the mushroom drive than to offer a satisfactory rationale or something.