Hey there. I have been reading along to learn about the Sans. Beautiful plant you have aocain! I agree that I would put more holes in the pot or, if you don't want to risk damaging the pot, at least a good layer of gravel/rocks in the base of the pot before adding the planting medium.
I wonder if you might add a companion plant by burying a small pot of something like Donkey's Tail so that the plant could trail over the edge of the pot while keeping its roots separated from the Sans? Just a thought.
@purpleinopp, your information about..."Let's please put this "likes to be root bound" myth out of its' misery!" would make a great article; please consider adding some of that in an 'Article/Idea'.
Okay, that's it. I'll go back into 'lurking mode' now.