I have actually, I do things a bit differently however. I don't use the saplings for biomass, I use plantballs from the leaves using the leaf shearing ability of the harvesters.
I really don't recommend using the emerald upgrade, the farms are more efficient when they are smaller so you are better off just making a bunch of smaller farms.
I've been running 36 max size HP boilers (with fuel surplus) from 2 copper upgraded (11x11) MFR farms in the following video:
However, I've been experimenting with rubber tree farms instead and they seem to be a better option. I centrifuge the rubberwood and resin to get plantballs and compressed plantballs.