Is a fuji firmware needed on both units to use a fuji camera for TX(transmitter) side and a.n.other brand of flash on the RX (receiver) side?
If we don't get this answered before the Pentax X-TTL firmware is released then I guess we'll find out then.
Yes, install both transceivers with X-TTL firmware versions.But you can mix them, say..TX = FUJ.1.002RX = SIG.1.002
BTW, have you used V1.1.010 for your Pentax cameras (there is even a V1.1.011 now). I remember you had trouble with V1.1.007/8 and wonder whether your problems went away with later firmware versions.
I've recently bought a (1) V6ii (with firmware updated to FUJ.1.002) and tried to use TTL on (2) Nikon SB700 in conjunction with (3) Fujifilm X-E2S. It doesn't work. Actually, V6ii is not designed to do that? My assumptions that the three devices are compatible with each other is wrong? I guess I might have overlooked some info on the Cactus website before deciding to buy one. I bought the V6ii mainly intending to use TTL, and now may have wasted my money and the unit of V6ii I own.