Can a camera-mounted TT350F get TTL with a second, off-camera TT350F? I would assume so but one chart showing compatibility (which I can't seem to find now) listed a variety of masters that would trigger the TT350F and a variety of slaves that could be triggered by the TT350F, but oneTT350F trigger another wasn't listed. I'm interested in this pairing because most of the time I just want on-camera flash for simple fills. But occasionally I'd like off camera TTL and it would seem simpler just to pull a second TT350F out of the bag instead of moving the on-camera TT350F off camera and triggering it with an XT1F. Thanks.