Resolved! Using the R8 and "old" style 5 pin flashes (e.g.,., 580 EXII, 430 EXIII RT)
R8: I'd like to ask about using Canon's new flash hot shoe contact with the R8. My understanding was that the R8 can ONLY take the new hot shoe style flashes and that you needed an adapter to use an old "traditional 5 pin" flash. Well, I used a 430...