Has anyone tried any of the current generation Nissin built Leica flashes on an X2D?

[RWilsonL]

I am just in the process of acquiring an X2D, with both the body and a 35-75 lens bought, collecting the camera on Wednesday and the lens being delivered from Wex tomorrow. This is my first non-Leica acquisition for a long time, having been a Leica user and collector for the last 60+ years, with currently 37 different Leicas in my collection, some from two previous generations, also Leica users. I have both of the current Leica Nissin built flash guns, the SF40 small and SF60 larger models. Now I know these use Nikon pin out, as I use a Nikon SC28 flash extension cable with my TTL flash equipped Leica cameras (M7, M10-R, Q3, R9 etc). What Leica won't tell me is if they also use the Nikon TTL control protocol like the X2D does and if at least it was safe to try and SF60 flash on my X2D. My guess is that it would be perfectly safe and at worst I can just use the flashes on auto mode, not using the TTL sensor in the camera.

Wilson