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Yes - Liveview on a bright star can give you very sharp focus. I now find a Bhatinov a little less fiddley, but I'm not sure my focus is necessarily any better than it used to be using diffraction spikes and Liveview + a bit of care.
Its good practice anyway to see what "just off" focus looks like so you can check for it by blowing up images on the camera screen or laptop. Nothing worse than wasting shots at a dark sky site from bad focus.
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