Hi Eduard,
Thanks for the help, unfortunately this only half works, 3 of the 6 trees are screwed up with the after mesh wind modifiers, basically it seems to explode the trees into all directions, very strange. You can only tell this when you render the scene and not from the viewport display.
I wonder what's causing this? I wondered if it could be meta-meshes instead of cylinder mesh but it isn't, I also turned off optimise mesh, it's not that either.
Any thoughts?
Thanks