Wow, a little testy around here today!
I just keep a copy of my fit by my tools and transfer the measurements to new bikes, it has worked for almost everything. If something isn't right you should be able to feel it and go from there.
I got fitted for my main road bike a while ago. Its fit has drifted since then. I do all my bikes by feel at this point.
I might do another pro fit if I bought a whole new bike, and I'd certainly do one if I was ordering a custom. But I think once you know what correct feels like, it's not too hard to do it again. Aside from my main road bike, all my other fits are somewhat compromised for off-road handling anyway, and that's not something that can be worked out on a trainer IMO.
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