I kept my two year old lesliei ssp. burchellii C308 in three 5x5cm pots, ca. 16 plants in each. As they started to touch and squeeze each other (No touching! -George Bluth) I've decided to make it 9 plants per one container. It also was an excuse to make some pre-celection and arrange them according to size and looks. The markings should get more distinctive with time but there are some promising specimen already. This is my take: larger windows in the first pot, "lines" in the second, others I like in the third. The rest went in the 4th pot for further contemplation.
I really like the one in the middle of this pic.