How to flash LEDE only to GL.iNet products

Technical Support for Routers
1

I’m not sure how to flash LEDE only to your routers. Any suggestions?

2

There is nothing special, at least regarding MT300A. Simplest is, to ssh into router,
cd /tmp
download the openwrt-/lede image to flash
sysupgrade (-n) image.bin

Or do it from the GUI, BUT do not keep the settings.