okay so if I’m looking to verify if an issues gl related or not it would be nice to be able to reboot to openwrt and verify. I have asked this before so here it goes again
bump
You want two OpenWrt on one router? Better not.
I know i know twice the work for me right ? 
I tried do extroot on brume and set /overlay to /dev/mmcbk0p1 but it diddn’t work. I prefer running off external storage. got any tips for extroot then?
Exroot should be pretty easy. You can just use guide in openwrt. I have done that before and it is quite easy.
I’ve done extroot on 750,mv300v2,ar150 without problem. something different going on with brume.
yeah I know it’s pretty easy. on the brume it seems like at boot time when it’s supposed to mount the partition specified for /overlay it fails mount. I did a fsck.ext4 on the partition but still fails
after some exploring
the /etc directory is not being created which contains the fstab to define mounts
grep -e rootfs_data /proc/mtd
yields nothing (blank no response)
how the brume boots is much different than your other routers.