At last I can give a off road update, the first track was mostly hard packed sand, there were loose and wet areas, plenty of exposed roots with a few short but steep drops and rises, and generally very technical as trails go. The second track was more open and flowing, mostly loose gravel and hard pack with a few muddy Areas.

I'd dropped pressure down to 25psi, on both tracks it's boring to say but the tyres worked very well on both tracks, no issues in loose stuff once the bike was moving, I've no idea what speeds were done but I was only in second for both tracks.