Well, finally got it all to work!
No amount of fixing the ir blasters to the front of my Sony equipment work work.
After browsing the web for similar situations for getting the GC-100 to work with Sony stuff, someone mentioned that the slink port on the Sonys can be simply connected to the GC-100 with a standard male-to-male mini jack (from Radio Shack). Just reconfig the GC-100 ports as IR ports with no carrier. Damn, what a journey.
Anyhow, I hope this helps someone else...