Waveshare's ST3215 digital servo has a fairly complex and odd body shape. This model contains a mount that snugly fits the servo's body. The mount has holes matching the eight mounting holes on the servo for use with the self-tapping plastic screws that came with the servo.
I printed this using Fiberlogy's PCTG filament, and I would recommend using a slightly springy, technical filament instead of PLA.
I recommend printing the mount sideways with organic supports for the bridge on the mount's front. If you don't want that bridge, you can just clip it out with a pair of side cutters after printing.
You can either copy the provided STL into one of your models, or you can extend the OpenSCAD script.
The author marked this model as their own original creation.