This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/35cNdkl4vyG
This is my second attempt to make a reasonably sturdy all in one mount for the tail end of my Space One Formula 220x drone frame. This one is much more suited to bottom mount batteries. I use the stripped off insulation from some braided steal cable I had lying around for rx antenna tubes, hence the over-sized rx antenna tube holes.
Use a skirt at least to get the material flowing before the print starts.