Ok, so I have had a little play with things. I took the shroud off and just tried it with the moderator. I have a Weihrauch mod, and that works a treat. So I am going to get carbon fibre tube and make a shorter shroud, as I like to be able to return things to original, as I didn't really want to cut the original shroud at this stage.
One thing I noticed was that the barrel support lifts the barrel up about a mm at the muzzle, so obviously poi changes quite a bit. So until I sort out the shroud, I turned up a delrin ring to hold the barrel in the original position in the barrel support temporarily. The photos show the difference before, and after I slip the ring in place.
So this makes me wonder if I am better off just free floating the barrel, but then I like the look of the shroud. So my options could be:
1, No shroud, totally free floating
2, Shroud fitted, but remove barrel support
3, Shroud fitted with barrel support, but pack out barrel support so barrel sits in it's natural position, but has that protection of the barrel support. See photo.
It would be great if the barrel support was adjustable like adjustable scope mounts are. Maybe there's a 3D printer out there that could make an adjustable barrel support that can be tightened once barrel sits in it's natural lie. They could send it to me and I will trial it, for free!

Vague concept drawn onto the second photo.
I'm not rough enough with my guns that I would bump it all the time, so removing the barrel support would be fine for me, but then it also gives the scope rail and barrel a bit of rigidity in the event of getting bumped. So keen to hear others thoughts, even though asking about free floating can open a can of worms.
thanks in advance,
Paul.