Loving this tank! Good to see that the stock light can grow plants!
I have recently "discovered" the Evolve 8s. They are awesome.
PS Can I steal some of your filter mods?
Go for it with the mods! My current mod is a fluval foam for the 105/106 canisters and bought a sink rack from the dollar store cut to fit in that sump to hold the foam in place (it's already snug but doesn't hurt).
Will be adding a peace lily back there also as a planted riparium/filter.