I’m afraid I haven’t tracked Festools since making my purchase — apparently they got a bit more complicated w/ Bluetooth and so forth being added.
The 26/36/48 were available back when I got my Midi and are all larger than it — the Midi size seems fine to me, esp. since the bag capacity isn’t an issue so long as I never allow the cyclone to overfill.
It looks like a newer version of the Midi is still available:
and some folks have gotten the Mini for use w/ the Oneida Ultimate Dust Deputy.
The Festool cyclone, the CT-VA-20 is really neat — being transparent is a huge advantage (I always spill a bit of dust checking the bag in my cyclone) — but is apparently optimized for contractor use and heavier debris, according to at least one review I read.
Mystified that they don’t bundle it w/ the CT SYS HEPA Systainer Dust Extractor.
Still debating on going all-in on the Systainer concept, unfortunately, that’s a huge investment, and the Oneida Ultimate Dust Deputy rather puts a cap on the CT Midi and the hoses aren’t long enough for anything in-between, so I need to get a separate cart or something.