I've seen people build their bottom feeders with mesh. That's the closest thing to a selling argument for me. Just haven't been able to pull the trigger as I'm happy with what I got. I already have drippers set up with mesh - so a Reo (with import taxes and fees) would be one expensive way of getting more or less the same end result. I have no problems seeing why they have such a dedicated following tho. Seems to me the two most content groups of vapers seem to be gennie and Reo users.
I am literally thinking of a pyrex tube where the bottle in a Reo sits. With a removable gennie deck on top to hold a mesh wick. Or, in a perfect world where I could make some - or have some made - with no money concerns; I'd make one with different decks available. One for mesh wicks. One for auto-drippers with bigger wick holes. And possibly one with a submersible kayfun-ish chamber.
The Kato comes close... but it still wastes a whole lot of space on housing an ordinary atty instead of going the full mile. Reminds me I want one of those. But my next vaping purchase will be a big tank DID.
I'm thinking to put a UCAN where the bottle in a Reo sits.