For those of you who have mature Mammillaria spinosissima, what do you pot them in and how do you provide support? (Please share pictures). My last repot on this guy was maybe 2 ½ years ago and I'm contemplating if he will need one this upcoming spring. I did a little rearranging so he is no longer laying on my Mammillaria bombycina who is about to shoot out another pup. I over turned an empty flower pot for support. Just wondering what other people do for theirs.