Another public post for the curious.

Quick Tip: For adding foliage and other items to terrain pieces, try a hot glue gun. I recommend getting a dual temperature hot glue gun (mine has 'Hi' and 'Low'). It sets quick, the sticks are inexpensive, and you can crank up the heat if you have to glue a large piece down. (So the glue doesn't harden before you finish applying it where you need it.) No need for an industrial gun, and don't bother with a low temp. This is a pic similar to mine.