Thanks for the answer, it was very helpful.
In this case, where i could find the the previous version of the image builder that can create nand/nor images for the ar300m16?

Also, I’m a bit confused, in case I just have the nor, how do i flash the router (it already has the lastest verion of the default firmware), do i need to use the uboot interface and then force the router to always boot using the nor?

Thanks!