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projects/sag-mesh-plane-v0u1/sag-mesh-plane-certificate-central-compromise.md

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+# Sag-Mesh Plane v0.1 — Certificate of Central Compromise (CCC)
+
+**File:** `sag-mesh-plane-certificate-central-compromise.md`
+
+**1. Design Name**
+Sag-Mesh Plane v0.1
+
+**2. Central Compromise**
+The plane is formed from a deliberately under-spec PLA+ mesh grid printed only in the Y-axis, with large spacing (2–3 mm) that sags and barely fuses. Flatness and stiffness come from filling this flawed mesh with cheap cement/plaster.
+
+**3. Purpose of Compromise**
+To create a rigid, flat panel at extremely low cost by combining a weak, flawed printed lattice with abundant, globally available fill material.
+
+**4. Good-Enough Justification**
+The cement provides bulk stiffness; the mesh provides shape control. The result is good enough for jig boards, shelf shims, or tool bases. Not structural, not outdoor-rated—but usable, cheap, and replicable anywhere.
+
+**5. Replicability Proof**
+Anchor COTS: rapid-set cement mortar (globally ubiquitous).
+Alternate: Plaster of Paris or Perfect Cast for lighter builds.
+
+**6. Substitution Map (Optional)**
+- Heavier/stronger: Portland cement.
+- Lighter/weaker: Perfect Cast plaster.
+- Optional: mosquito net as a poor-man’s fiber mesh insert.
+
+**7. Failure Envelope**
+- Not for load-bearing or structural use.
+- Fails by visible cracking or edge chipping.
+- PLA creeps under heat; not to be left in hot sun or car.
+
+**8. Statement of Intent**
+This design embraces flawed printing and cheap fill to democratize stiff panels, trading durability and precision for cost, ubiquity, and accessibility.

projects/sag-mesh-plane-v0u1/sag-mesh-plane-design-passport.md

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+# Sag-Mesh Plane v0.1 — Certificate of Central Compromise (CCC)
+
+**File:** `sag-mesh-plane-certificate-central-compromise.md`
+
+---
+
+**1. Design Name**
+Sag-Mesh Plane v0.1
+
+---
+
+**2. Central Compromise**
+The plane is formed from a deliberately under-spec PLA+ mesh grid created in OpenSCAD. The print alternates **Y-then-X line layers**, with each line made from **two nozzle passes** (≈0.8 mm total width using a 0.4 mm nozzle). After each layer, the nozzle is raised **0.2 mm** and the orientation switches. This creates a grid with **2–3 mm spacing**, prone to sagging and weak fusing. Stiffness and flatness are only achieved by filling the mesh with rapid-set cement.
+
+---
+
+**3. Purpose of Compromise**
+To create a rigid, flat panel at extremely low cost by combining a weak, sagging printed lattice with an abundant, globally available fill material.
+
+---
+
+**4. Good-Enough Justification**
+
+* Cement provides bulk stiffness; the PLA mesh provides geometry and a mechanical key.
+* The alternating Y/X pattern reduces directional bias.
+* Produces flat-enough panels for jigs, shims, or tool bases.
+* Not structural, not weatherproof, not heat-resistant — but cheap and repeatable.
+
+---
+
+**5. Print Sequence (Explicit)**
+
+* **Layer 1 (Z=0):** Print **Y-oriented lines**, each line = 2 passes (≈0.8 mm), spacing 2–3 mm.
+* **Raise Z by 0.2 mm.**
+* **Layer 2:** Print **X-oriented lines**, same spacing and passes.
+* **Raise Z by 0.2 mm.**
+* **Repeat Y/X alternation** until desired thickness (3–5 cycles typical).
+
+---
+
+**6. Replicability Proof**
+
+* **Anchor COTS:** rapid-set cement mortar (globally available).
+* **Alternates:** Plaster of Paris / Perfect Cast for lighter builds; Portland cement for heavier.
+
+---
+
+**7. Substitution Map (Optional)**
+
+* Heavier/stronger: Portland cement.
+* Lighter/weaker: Perfect Cast plaster.
+* Mesh reinforcement: mosquito net or screen.
+
+---
+
+**8. Failure Envelope**
+
+* Visible cracking or edge chipping.
+* PLA creep under heat.
+* Panel not suitable for load-bearing or outdoor use.
+
+---
+
+**9. Statement of Intent**
+This design deliberately embraces a weak mesh and flawed print process, relying on cheap cement fill to achieve utility. It is an explicit trade of durability and precision for cost, abundance, and accessibility.
+
+---
+