Thanks it is becoming a bit of a beast. I bought it of a old local cacti collector three years ago for my youngest daughter. Sadly the guy that I bought it of passed away last year and I haven't yet found out how much of his collection his son has kept. The wost thing is I believe the house has been sold and so all of his mature plants that were in the ground could have been chopped down by the new owners.
I do know some one that managed to get the mature Bridgesii's that he had and clones form those plants have been traded over here for three or four years. The clone was named after the the old boy and so it is known as "Mike".
I know this is all a bit off topic but I think its an interesting story. :smile:
Here is a couple of pics of the Mammillaria bocasana. The first one was taken when I potted it up when we first got it and the second and third were taken towards the end of last year before it got given some much needed space in a new pot.