# Hardware Builds & Questions

**URL:** <https://opensourceleg.discourse.group/t/hardware-builds-questions/11>\
**Category:** Hardware\
**Created:** [May 13, 2025, 6:09pm UTC](https://opensourceleg.discourse.group/t/hardware-builds-questions/11 "2025-05-13T18:09:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![OSL\_Admin](https://yyz2.discourse-cdn.com/flex036/user_avatar/opensourceleg.discourse.group/osl_admin/32/10_2.png) [@OSL\_Admin](https://opensourceleg.discourse.group/u/OSL_Admin)\
**Post date:** [May 13, 2025, 6:09pm UTC](https://opensourceleg.discourse.group/t/hardware-builds-questions/11/1 "2025-05-13T18:09:42Z")

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Use this space for questions and troubleshooting related to the OSL’s mechanical and structural components.

When posting, please include:

- Which version of the OSL you’re using (v1, v2, custom)
- A brief description of the issue (with photos if possible)
- Any changes you’ve made to the design or parts

This subcategory helps us keep hardware-specific questions organized and searchable for future builders.

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**Author:** ![PinD](https://avatars.discourse-cdn.com/v4/letter/p/858c86/32.png) [@PinD](https://opensourceleg.discourse.group/u/PinD)\
**Post date:** [May 14, 2026, 6:06pm UTC](https://opensourceleg.discourse.group/t/hardware-builds-questions/11/2 "2026-05-14T18:06:47Z")

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Hello everyone,

I’m currently working on a prosthetic leg project V2— it’s been really helpful, so thanks to everyone who contributed.

However, I couldn’t find detailed documentation or CAD data for the **z\_pylon component** , which connects the ankle and knee. It seems to be a critical structural part, but I wasn’t able to locate its detailed design or drawings in the shared resources.

Does anyone know where I can access the CAD model or technical drawings for this component? Alternatively, if anyone has redesigned or modified it, I would really appreciate any guidance or shared experience.

Thanks in advance!

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/opensourceleg1/original/1X/2d406c12cdd7c3cf75da5b038e190efb91821e47.jpeg)

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**Author:** ![elissacimino](https://avatars.discourse-cdn.com/v4/letter/e/e9bcb4/32.png) [@elissacimino](https://opensourceleg.discourse.group/u/elissacimino)\
**Post date:** [May 15, 2026, 6:18pm UTC](https://opensourceleg.discourse.group/t/hardware-builds-questions/11/3 "2026-05-15T18:18:49Z")

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Hello!

The **z\_pylon** is an outsourced component, so we do not design or machine it ourselves, but [here](https://cad.onshape.com/documents/0b00e5e49b04864c9d9629ce/w/379c2076367b223817131731/e/d51845dd1e5532857a88c425?renderMode=0&uiState=6a06331b2486e0233c11b213)is the model we use in the CAD assembly for integration purposes. The pylon dimensions (e.g., length and wall thickness) are not universal and are often adjusted based on the user’s height, alignment, and loading requirements. We typically source these types of prosthetic components from suppliers such as [Bulldog Tools](https://www.bulldogtools.com/prosthetic/).