So as this was my thread i’ll update a little.
I ended up getting a pair of black chilli tubeless ready protection trail kings from a german site. I’ve only got access to a track pump and not a compressor and i struggled to get them to go up tubeless. I think partly because even at 2.2 they are pretty big volume and difficult to pump air into quickly enough and partly cos my rear stans rim is badly bent it turns out.
Bmx tubes/ghetto method to the rescue and they have been fine once up and sealed.
So far i’m really liking them. They feel grippier and more confidence inspiring than the nics did and still seem to roll well. The taller proile seems to give a little more cushioning too.
Mud wise they are ok and i’m too lazy to swap to a proper mud tire – i’ve put flat pedals back on and i’m embracing getting loose and speedway turns instead!