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Bear in mind, that sometime when you tighten the calipers, the washer will move it a little, so if it look straight now, it may not be after you have tighten it.
You can see it when you tighten it and see the body move very slightly, which make the difference between rubbing and not rubbing, the rotor is never 100% true, so you'll also need to do that by eyes too.
It's worse when you took the wheel out and depress the levers to bring the pads closer, which mean that the slightest the rotor is out of true by, it'll cause rubbing.
Ok, I'll give it a go.
Need more arms... if only I was Tasmanian...