Thanks for the tip Maudib...
When you attach your greebles to the main mesh, do you use "align" or "rotate to object tool?
I've been doing it manually and was hoping for something to speed it up. A new feature in 11.6 is the "Place Mesh" tool.
All my Greebles are on another layer... The downside with Place Mesh, is that you have your greeble in the background... The click on the target object or mesh in the fourground. Wa-la, there it is. But, it puts the greeble on the same layer.