I'll be lowering the bar with my next puzzle too!
Please do it. Afterwards I can rise it again!
I think that you've already made a "3x3x3 Trajber's octahedra Family".
and now you have a "Plane Cubes Group",
And I have already built a SaturnCube Family...
Funny thing now that you mention it. I currently build two puzzles and one of them only to complete another family... More to come.
All three are made out of ordinary 3x3x3s.
Take cube like the attached one, drop the cap of the face cubie and shave it down as far as it is possible with shaving the base plate with the screw inside it.