The stated "new Rpi W" is probably a reference to the Raspberry-Pi Zero W, which has the same chip as the original B+. The 4.1.x images should run on ANY R-Pi; 3.x will not run on the 3B+ or 4B models.
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Re: pistar-upgrade 4.1.1 from 4.1.0
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AF6VN
Dennis L Bieber