We were shooting two af100s with free run timecode set to the time of day. I used the tc link feature and set one as master and one as slave. They were dead on all day. We did not use a gen lock for sync. They were running at varied start and stops all day but they overlapped a lot. We were covering a ski joring race with a lot of time inbetween competitors so we didn't want to keep rolling. The beginning of our timecode starts at 12:29:19:12 and ends around four hours later.
Thanks for the help!