Don't reboot router until you get your old CFE off the router.
The files are stored temporarily so if you have rebooted the router since upgrading the CFE the old CFE may be gone now.
Whoops!
Got me on that one although I've never ever saved old CFEs on any router. I shall remember for the future as for sure it is best practice in case the new CFE is faulty like what happened reading the earlier threads.
I've double checked I have the updated CFE with the commands to get into the new CFE itself with the correct VLANS, checked the logs to see the size of NRAM reported etc. and everything is fine.
Now the temptation starts to get Shibby Tomato into the router mainly because of its better QOS compared to the stock Asus and Merlin's builds.
I wish that Merlin would improve the QOS in his firmware...