Thanks for sharing Greg, all our plants can't be stars of the show all the time!
Your technique may not ever make the "fill in" they just aren't that kinna plant, it will lead to lots of plants! Those stumps will sprout new heads, once they size up a bit, cut them off and root them too!
If you don't mind my asking, where's they come from?
Did they come with those ID's?
At the risk of being that guy...I gotta say I strongly question the ID of several your plants...
I don't get hung up on names much tho, either way, nice plants!
I def think Tiffany's plant there is coarctata, limafolia it is not! Limafolia will never grow much height, they just grow a very tight rosette of spiraling leaves, I can also see white spots on her plant, to my knowledge, the only limafolia form with any white tubercles is limafolia striata, which of course had horizontal bands on each leaf.
Tiffany-ouch 28?
You are no doubt pushing the envelope there!
Keep those babies bone dry!
If you gotta pull em out, you can literally do just that and pile em in a box, they will be fine.