Thanks guys, I have been searching for info but most threads seems to fizzle out before any concrete info comes up. Lots of talk about using the standard type carbs, a few mentions about video which I cant find and no definitive prop size/type for slow flying WW1 type aircraft.
I see the easiest method of prop driver using the mag ignition is a basic driver using it as the flywheel nut, this concerns me that it may come off with hand starting and I'm reluctant to put any thread lock on. I think for now I will stick with the mag ignition as I intend to use my XYZ CDI on my Zenoah 62 conversion.