Gary
Before the Winkey emulator was available, I had made up a custom cable to tap into that signal. I applied the real winkey output to that line, and used the keyer in the RRC Control box to send keyed messages. Its probably been 4 years now, but I know I had it set up to do that at one time. Since the Winkey emulator was enabled, I'ved used that. After a few hiccups, it has worked with a hitch.
My all time best rate on RR CW has been a 168. I have not found latency to be a problem.
Dennis W1UE