.. cannot find a way of opening it to paste the garden hedge (Paste to group is greyed
But maybe my file is messed up, I will try again

Most strange, cannot recreate this today (after having restarted everything). Will let you know if it happens again.

Would it be a good idea to include an invisible texture in the collection while you are at it? Don't know what happened in 5951#25821, but transparent textures is a good way of hiding furniture elements until transparency can be implemented in the colour dialogue.

ok