Hey Stewart...if you have not seen FB yet I can report that the new build on PI4 8GIG using Astroberry and 128g SD and also booting from 500g mSata vis USB3 all all good and stable - FULLY updated with Raspbian and I also built latest Kstars + stellarsolver on the PI. Have had no issues in over 24 hours of constant load testing (does anyone need that many darks :-) ).....I have started doing a diff of services running SM vs AB and the first that popped up was X11 was NOT running on the AB as it comes installed with VNCserver. That Boot issue we have both encountered I am starting to suspect was nothing to do with drives or size but more related to order of boot services and timing (perhaps via USB you get dragged a little as it is not the original way a PI knows to boot and there could be race condition there that gets triggered - or as I loved to troubleshoot years ago NIC and Graphics incompatibilities which at least in windows ended with BSD) - anyway - eventually I will start breaking the AB setup by turning on services to match SM until it dies -

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