Yeah that's really taken off. When I got the cutting it didn't really show it. I'm so happy with it. My wife calls it Groot  the character from Guardians of the Galaxy.

Crested San Pedro. It was a really thin cutting and only seemed to root about a few weeks ago. All of a sudden this week it has doubled in thickness. My favorite one for sure.

An awesome morning when you realize your cuttings have all decided to produce pups, your seedlings now have little spines on em, and your favorite one has gotten super thick. This has all happened over a few days and I just noticed. These cacti are amazing.