Has anyone actually used a Nikon SB28 (or similar Nikon flash) or Canon 580EXII flash on a Sony RX100II, without damaging the camera?

I realise the flashes wont talk to the camera but I'm only after manual flash control anyway, old skool stuff.

The SB28 and 580EXII have a locking pin which is lowered as the flash is tightened and I wonder if this will cause a short on the cameras electrical contacts?

The 580EXII also has a metal foot so I also wonder if this has potential to cause shorts?

Thanks in advance