cb_a_dev? what is that?
Keep in mind "RGH2" requires dual CB (CB_A/CB_B), a different wiring method and less reliable glitch times - not RGH1 which is what you should be using on a JTAG.
there is simply no need of CB_A/CB_B on a machine that hasn't been updated to 14717+, there is only CB/CD/CE/CF/CG.
As for fusion, I imagine they watch this board and will answer you if they feel like. I've personally not tried it after spotting a few nasty problems in their beta and simply moved on, so all I can really say is my own stuff to use dev on jtag/glitch works perfectly with this console in both glitch and jtag modes.