Thanks, Arnie. I was hoping you'd found a way to trigger a TT5 from the PC port. I've got a MiniTTI/AC3, a pair of TT5s, and an MC2 for my Einstein, but since moving to the Canon -RT system, the reliability makes me reluctant to spend more on my PWs. The Einstein's optical slave has been working for me, fortunately.
There's a mini pc port on the Flex5, I know you can us it plug it into a studio flash for receiving...I assume you can plug it inot the PC port of your camera for transmitting
What reliability issues are you having with your pocket wizards?