@dcc @pernia Some of them are finicky about partition layouts so I start just using a dd of the first few hundred megs, then fdisk to repair the partition table, usually use the upstream DTBs but I did a build of uboot from a dev branch to get around a bug (and apparently uboot does PXE now and I have been meaning to play with that) so usually I just dump my own uboot in, make a note of the root partition's label and usually reformat it with the same label, then I've got a root and a /boot to put whatever into. It's kinda sloppy but it's fast and results in a working system.