Considering that one of the challenges is keeping the seed-parent plant from self-pollinating, ending up without a cross but with viable seeds seems almost inevitable from time to time.
Have you ever tried any crosses with capensis?
I already sell extras on ebay, and advertise on other forums where sales are allowed. I have plenty of extras of a lot of the spatulata x tokaiensis type crosses, and a few extras of many of the others too.
Also, side note: with the filiformis FL giant flowering recently, I attempted crosses between it and D. capensis alba, sp. Lantau Island, and most exciting as it appears may have worked at least one direction: affinis.
Mmm, a filiformis hybrid. When can we expect pictures?