Questions
What software do I need to open the CAD?
Both editions include individual part and tooling STEP files plus PDF drawings. Complete adds the full-kart assembly in STEP, IGES and OBJ. STEP can be opened in compatible software such as Fusion, Onshape, Inventor, SolidWorks and FreeCAD. These are exported models, not a native CAD feature history.
Do I need a tube bender?
The original frame uses bent tube. To reproduce it, use a suitable tube bender or have a fabrication shop make the bends. Mitred or pie-cut welded alternatives require extra fabrication work and assessment of the joints and geometry; they are not a simple vice-bending substitute. Check the drawings and your fabrication approach before buying.
What welder do you use?
You do not need my tools. The kart was designed around a normal MIG welder, not the gear in the videos. If you can lay a sound weld on 2.0 mm wall tube, you have enough welder.
I am in the US. Can I still source the parts?
Yes. The bill of materials was priced in Australia so the links point at Australian suppliers, but almost nothing in the build is Australia specific. For Amazon items, swap in your regional Amazon and the product code after /dp/ usually finds the same part. Steel, fasteners and the donor kart are all better sourced locally anyway. Every part is described by specification, not just by link, so you can buy the equivalent anywhere.
Metric or imperial?
Metric throughout. Frame tube is 31.8 mm outside diameter with a 2.0 mm wall, rear axle is 30 mm.
Do I need a CNC machine or a laser cutter?
No. Those parts are separated into their own folders with drawings, ready to upload to a fabrication service. Budget around USD 550 for those outsourced parts, included in the parts budget above. You will need welding, cutting and drilling equipment, plus a suitable tube bender or an outsourced bending service for the original frame geometry.
Do I pay again when the design is updated?
Updates to the files in your edition are included. Workshop updates do not add the full-kart assembly; that is included in Complete. Original package buyers retain Complete access. The update log records what changed.
How long does it take to build?
Depends on your shop and how much time you get. The bends in the frame are the slowest part, especially if you are mitering or pie cutting them rather than using a bender.
Is this suitable for a school or STEM program?
I’m in touch with teachers planning classroom builds. The STEP CAD files can be opened in Onshape, and the dimensioned drawings work for students who are in the workshop rather than in CAD. I work with schools case by case, so if you are planning a class build, email me before you buy and we can talk through what your program needs. Explore the teaching ideas and discuss a class project →
What if I get stuck?
Email me. I built the thing, so I can usually tell you what went wrong from a photo.