Xerophyta retinervis

[CG100]

There is a very brief and old thread here on the website, but has anyone grown the plant beyond seedling?
Growing Rare Plants by Geoff Nichols implies that growing the plant once established is relatively straight-forward, but makes no mention of early growth from seed and transition to a normal cycle of "wet" summers and dry winters.

I have several seedlings from seed sown as suggested both in the archive here, and elsewhere online - surface-sown onto saturated compost, the pot half-submerged in a pan of (rain) water. (To reduce evaporation, I have used my usual method of fitting a cheap shower cap over the whole lot, so the seedlings will be sitting in water and in air near 100% RH.)