Nice Work! I had not even considered hybridizing anything with intermedia, aliceae, or filiformis.
NatchGreyes told me about this thread + forum, so I wanted to come check it out. I've got Capensis, spat(fraziers island) and venusta flowering right now so I hope to get some successful cross pollinations this week. I've found that waiting for the flowers to open is a bit tricky for me. I only have about two hours before the cape or spat closes. My venusta however has been slowly opening for the past four days.