In order to enable your addiction, I have some additional info on your hybrid Tatachilla. It is technically a Zygoneria, not a "simple" Zygopetalum. Two of Tatachilla's eight "great-grandparents" are Neogardneria murrayana, related to Zygopetalum yet distinct.
--Stitz--
I searched the RHS database and found something to that effect too; cool stuff. I didn't know Zygoneria was even a hybrid genus!