UPDATE 11/3/25: You can now access the Octoball-loader dovetail appendages pictured above! All together, they hold up to four octoballs comfortably, and are an edited version of @WITTODETTO's fantastic “Vex Robotics Push Back Loader Tube Mockup." You can find them in a print profile on @WITTODETTO's model page: [https://makerworld.com/en/models/1515342-vex-robotics-push-back-loader-tube-mockup?from=search#profileId-1587368](https://makerworld.com/en/models/1515342-vex-robotics-push-back-loader-tube-mockup?from=search#profileId-1587368), appropriately named ‘Adapted for @droot64’s VEX Multitool.' There are two parts: the main loader tube (which uses two dovetail joints) and an extender tube that uses only one. Thank you, @WITTODETTO, for allowing me to create and share this variation.

Developing, testing, and running a robot, especially without a dedicated space, is a costly expense every VEX V5 team must reckon with. While not intended for use in an official Push Back game, this multitool addresses this problem and will enable you to test your bot at home, in a busy tournament, or anywhere else! Not only is this PBMT inexpensive (when compared to official components), but its modularity allows for easy assembly and transportation (more on that later).

The design shown is printed in standard PLA, with 15% infill, and features modular capabilities that replicate EVERY function of VEX field components (and more!). The main body of a unit is accurate to a hundredth of a millimeter, and is a full-scale parking zone ledge with rulers that measure dimensional limits, extension limits, and goal heights (suggest any other measurements in the comments!). It has a multitude of dovetail joints that connect appendages for structural support, center/long goal replication, and ball loader tubes (see loader details in 11/3/25 update). To create a sturdy center/long goal, you should print the main build plate twice. 

All screw holes are VEX-screw compatible!

Components Summary:

1. VEX Push Back Multi-Tool Half 1 and 2: This is the main body, split in half with a larger dovetail joint.
2. PBMT Appendages Top (T), Middle (M), Bottom (B) Platforms: These attach to the long side of the main body through dovetails and have screw holes to attach tubes, such as:
   1. GoalTubePart.stl
3. PBMT Appendages Bottom Support: This is attached through a dovetail to the bottom of the main body, facing outwards. Note that the goal height measurements are accurate when this is connected to the main body.
4. Keys 1-3: These connect T, M, and B platform pairs when assembling the dual-multitool goal setup.

5. Holder: As it stands, this holder carries the full multi-tool and its four smaller appendages, but the tolerances on your printers may cause them to be too loose or too tight. 

    

Please don't hesitate to let me know if you have any issues. I am aware that dovetail joints require your printer to have adequate tolerance/dimensional accuracy, so please understand if your appendages do not fully fasten (note that the dovetail between the two main body parts is intentionally tight). Additionally, I designed the model to be fairly self-explanatory when it comes to assembly, but please feel free to reach out in the comments if you'd like more detailed instructions or to suggest additions.

There are individual STL files of each part in the drop-down menu under 'Open in Bambu Studio' if you do not wish to use the 3MF format. If Bambu Studio is your slicer of choice, I highly recommend using it, as the results you see in the photos utilize the 3MF's settings.