Watch Movement Ring

I picked up an old mechanical wrist watch this morning at a thrift store for next to nothing because the watch was loose in the case. The previous owner had lost the plastic ring that holds the movement in place so I printed a new one. The watch works great now!

This ring has a 2mm opening for the stem, is 3.5mm tall. Its OD is 31mm and the ID is 27mm. These measurements are specifically for my watch. I've included the DXF file in case someone wants to modify it for a different watch.