Comfast EW-72 - Keeping Luci after a reset

I installed the Snapshot image, and then Luci, and all works well. However, I'm trying to configure it as a repeater, and it seems if I make one wrong move, or the wind is blowing the wrong way. it locks up. I've reset (Holding down the reset button for 15 seconds) many times, and every time I have to reinstall Luci, which is a real pain in the butt. Is there a way to make Luci persistent?

imagebuilder or building from source, so the additional packages end up in the read-only squashfs.