Battat Bolt Replacement Updated Design

Review the images and update the design accordingly.  

Project Update — Battat Bolt Replacement

• Product Design — Multiple Lengths: The team identified that the 30 mm bolt length was not clearly documented in the original Battat hardware inspection. This has been resolved quickly, leveraging the parametric design approach (think: configurable and adjustable geometry). The eCommerce shop will be updated to offer both 30 mm and 40 mm bolt length options. If any members of the engineering community have knowledge of additional bolt lengths used in Battat toy hardware, the team would welcome that input. In the meantime, the 30 mm option will be added and customer feedback will guide any further expansion of the length offering.
• Product Design — Pitch, Major & Minor Diameters: During development, the team tuned thread pitch and major/minor diameters to achieve compatibility with original Battat hardware. This accounts for dimensional offsets of approximately 100 microns — roughly the width of a human hair or the thickness of a sheet of paper — visible in the updated design. The updated design can be reviewed here alongside reference images: https://www.you3dit.com/projects/battat-bolt-replacement-updated-design/design/show/1301 The team is seeking confirmation on whether rotational insertion — threading the bolt into existing flange nuts or toy components — is also a functional challenge, in addition to length. The current hypothesis is that the green arrow region in the reference images shows compatibility due to the affordance of additional bolt length, while other sections may require the 30 mm parts specifically (longer bolts would clash). Community input on whether length alone is the primary issue, or whether rotational insertion/removal is also a pain point, would be greatly appreciated. As a general note: the team designs for low tolerance given the realities of additive manufacturing — particularly extrusion-based processes (FDM/FFF). Length in this case is a design issue, not a manufacturing tolerance issue.
• Shipping / Logistics / Poka-Yoke: A configuration option was made available that was not viable for the intended use case, and the customer experienced the downstream consequences of that error. The team takes ownership of this and is implementing process changes to prevent recurrence. For those less familiar with the term: poka-yoke is the practice of error-proofing a process — designing systems to prevent or eliminate failure modes before they reach the end user.