Why not just upgrade his existing setup?
They sell all the parts separately here to piece together a totally custom look, top fill Subtank Mini also.
I really like the shorty top fill tank sections myself (better flavor because shorter chimney). The ones without holes in the top cap are best, imo.
Options here. I have
SKU 3535802 and love it.
Plenty of AFC bases with color options. I prefer the v1 airflow,
SKU 2340100.
Lots of colored glass options.Even the
RBA plus is reasonably priced, enough so you could buy several and pre-build them.
Another thought is the
nano RBA with bottom juice channels. They're also really easy to modify for more juice flow if needed. A bead reaming tool/file is sufficient to grind the channels larger by hand. Took me about 20 minutes to mod mine and it's a bit more MTL friendly than the RBA plus (slightly less airflow in the deck).
Edited on 8/6/2017 at 4:37 PM. Reason: