I'm going to have to find a photo of this cross online, it sounds interesting. I think I once had a nivium x stonei cross that had the same result as your cross, large plant, no bloom. Tried everything, finally pitched.
My Rand's Aircone Pots (that I've had for quite a while) do not have his name on them. The things last forever, my only complaint being that they are slippery compared to other pots. Need to be careful when handling plants potted in them.