sorry, didn't get to this yesterday.
Anyway, here's what we've been working on for non-servo lower section.
Ben able to keep the cabinet identical to the Super Mini so the Super Mini can just sit right on top... maybe with a think layer of Sorbathane betwen them .
fully braced cabinet with an overall height ( no super Mini on top) is 27.5" with a 1" base.
Front

Rear

Transparent from side

As with our other cabinets, all bracing located via dado's in wings and baffle. dowels/screws in base for easy alignment and glue up.
Haven't cut any of these yet, playing catch up with other stuff but they are on the list.
And yes, you want them out inthe room. I've heard of some people not quite making the suggested 3' min but idally, you want that. Maybe havem on some sliders so when you're critical listening, you can pull them out ? Have heard of people doing that as well.
jay