Gald you got the plants Ok. The seed for your plants came from Kohres. Hunt places, and the Fitz-Maurice's now agreed, this has a dwarf form of crinita leucantha.
This is ML 690, seed from Cactus Heaven, sown 30-1-08 and germinated 7-2-08.
The Fitz-Maurice's under took a population study of this form and the they determined the life cycle to be about 4 years in habitat, hence the need to flower early.
These plants are very similar to ML 138, moeller-valdeziana, which Hunt, again places under crinita leucantha.
This is the Fitz-Maurice's collection, WAF 1983. These plants have died, put I was able to save some seed.