Cactus / miracle kabuto seedling

I normally sow cactus seeds in spring and keep until next spring.
1 year old seedlings are repotted to 10 cm square pot, 25 seedlings each.
I have been testing a slightly differnt way.
I sowed quite many miracle kabuto seeds on 25/11/10 and repotted in autumn, 5 months later.
The photo is one of seedlings, 6 months old.
Cactus seedlings will be accelerated the growong speed after every repottings but will increase the chance of loosing.