SummaryNeed a transition section that's not available commercially? Want a hollow transition for a payload or electronics bay and you can only get Balsa? This customizer will create a solid model of the model rocket transition for 3D printing. You can set the shoulder diameters and transition lengthPrint SettingsPrinter: Wanhao Duplicator i3Supports: NoResolution: ABS 0.4 nozzle .200 mm layers Infill: 0%Notes: Very Challenging to Print. Requires Simplify3D to print effectively. The issue is that you need multiple perimeters where the body tubes meet the transition to ensure that you get a one piece part. You can try printing the entire transition with enough perimeters to support the shoulders, but then you get an excessively heavy part. I am able to successful print these using 6 different processes to increase perimeters where needed and still keep most of the transition very light using 2 layers. I use the section tool to examine how the layers are stacking at the tube ends. I print them in ABS for resilience. Can be acetone vapor smoothed for better surface and to assure good layer bonding.