[lime] Retrofitting some old luma routers?

Hi folks,

I'm brand new to looking at libremesh. I have some old luma routers and I'd
like to try flashing them with something since the luma project is dead at
this point and I have a use for the units now. Are there any setup guides I
could look at to do this? Or has anyone else done something similar?

Thanks for your help,
Stephen