We are working on the 3 way passive yes. Currently we are working on prototypes where you do have the same setup as the Mk3, and then 4 x 8" under in Isobaric bas system (so only 2 of the 8" is visible). This would make an insanely impressive floorstander for the size ! Really hope this works out as we hope

But we have done so many drafts of floorstanders that have never seen the light of day, so no promise yet