was aiming for about 4cm across, as its going ot be in the inset of a case similar looking to "the golden compass" but with a model of a city inside insted.
oh so thats what that means ok, ill change that. (have set all my stuff to be visible to all now)
I tried opening the one you linked to and got an "Invalid model id" error. Similarly, I found I can't open the .stl file you provided. I think I can help you hollow out your design if I can actually get it.