About this 3D model

It is a 200 mm in diameter moon lithophane globe with a 68.4 mm opening on the bottom, big enough for the standard E26 bulb, (https://amzn.to/2HFZUdi). I attached it my a rope lamp (https://amzn.to/2P76oGf) I got from Amazon by gluing my designed Base" file and screwing on the "Thread" file to the lamp rope. Then using 2 6-32 x 5/8 inch screws and 2 6-32 wing nuts. For this current design, I put the screws in before gluing the base to the globe.