message: pinch valve minor fixes
diff: @@ -30,8 +30,8 @@ v1.6: Broader shelf, slightly larger bump.
  ### Files
  -- [Base - .step format](assets/exhaust%20pinch%20valve%201.6%20-%20base.step)
  -- [Rotor - .step format](assets/exhaust%20pinch%20valve%201.6%20-%20rotor.step)
  +- [Base - .step format](assets/exhaust-pinch-valve-1.6-base.step)
  +- [Rotor - .step format](assets/exhaust-pinch-valve-1.6-rotor.step)
  Original design found
  [here](https://cad.onshape.com/documents/3fe0c1f79c482144c267173d/w/2ad1c08071a25185f9c78c68/e/03a49465e4e026f9f102d0af).
  @@ -69,9 +69,9 @@ The above files should not be printed with FDM. Instead, a leaktight method like
  | 11 | 1 | ST | X-NUCLEO-IHM02A1 | 15.00 / each | Buy | [S][11st] | **ALT for item 10:** Two-axis stepper driver dev board |
  | 12 | 1 | RespiraWorks | N/A | N/A | *Ask first* | [3D][123d] | BASE - 3D printed |
  | 13 | 1 | RespiraWorks | N/A | N/A | *Ask first* | [3D][123d] | ROTOR - 3D printed |
  -| 14 | 6in/15cm | McMaster-Carr | 5894K38 | 8.04 / 2 ft | Buy | [C][14mcmc] | **alternative to 8**, tubing 3/8" ID, 5/8" OD |
  +| 14 | 6in/15cm | McMaster-Carr | 5894K38 | 8.04 / 2 ft | *Ask first* | [C][14mcmc] | **alternative to 8**, tubing 3/8" ID, 5/8" OD |
  -**WARNING: Item 7 may have to be substituted by another adapter, depending on your choice of tubing here (items 8 or 14) and your choice of pneumatic system internal diameter. Alternative adapters are listed on main [pizza page](../../4_Prototype_Assembly/Alpha_Build_Instructions/pizza_build.md)**
  +**WARNING: Item 7 may have to be substituted by another adapter, depending on your choice of tubing here (items 8 or 14) and your choice of pneumatic system internal diameter. Alternative adapters are listed on main [pizza page](../../ventilator-build/alpha-build-instructions/pizza-build.md).**
  [1amzn]: https://www.amazon.com/dp/B07Z1J8JWH
  [2amzn]: https://www.amazon.com/gp/product/B00PNEQKC0
  @@ -85,7 +85,7 @@ The above files should not be printed with FDM. Instead, a leaktight method like
  [10key]: https://www.digikey.com/short/z442qt
  [10mr]: https://www.mouser.com/ProductDetail/511-X-NUCLEO-IHM03A1
  [11st]: https://www.st.com/en/ecosystems/x-nucleo-ihm02a1.html#sample-and-buy
  -[123d]: https://github.com/RespiraWorks/SystemDesign/blob/grace-pinch-valve-updates/2_Research_&_Development/Project-Pinch_Valve/README.md#exported-step-files
  +[123d]: ###files
  [14mcmc]: https://www.mcmaster.com/5894K38
  ### Tools
  