Cactus / cauliflower

I have tried various propagating methods for cactus.
The photo is Ariocarpus retusus v furfuraceus cv Suguri cauliflower.
The plant is 10 cm diameter and starting to show the character of cultivar.
I sowed seeds on 02/10/ 2010 and grafted young seedlings on Pereskiopsis stocks.
I degrafted with a short stock, 15 mm in spring 2012.
12 scions were set as same and waiting the development of roots.