Base Scaffold System

@@ -110,3 +110,9 @@ The current electronics are **V2.1.0** (see the control-panel page below). The s The system's electrical front door — specifications and the connector/disconnect interface — is documented on its own page, maintained by **Caleb**:  ➡️ **[Base Scaffold Control Panel](https://wiki.adom.inc/adom/base-scaffold-control-panel)** (linked as a dependency of this page)++## Molecule corner-pin selection++Choose the corner-pin class before PCB routing. Prefer [large pins](https://wiki.adom.inc/adom/machinepinlargeshort) for larger or heavier assemblies, attached cooling hardware, and standard tools that will repeatedly enter and leave workcells. Medium pins can suit compact, light assemblies on compatible user scaffolds. Record the selection rationale and verify the actual grid, socket fit, seating height and complete assembly clearance.++This preference does not establish a numeric board-size limit or a rated mating-cycle life. Mechanical strength, retention and repeated-use durability still require qualification. The [selection skill](https://wiki.adom.inc/adom/base-scaffold-system/files/SKILL.md) describes the checks and the downstream AIFlow revalidation required when pin size changes.

@@ -18,6 +18,14 @@ If the page still carries any `🔶 FILL-IN` item, treat it as unknown — do no invent values; name the section owner (James/Luke for mechanical, Caleb for the control panel) instead. +## Choosing medium or large corner pins++Make this decision during AIFlow intake and molecule layout, before routing. Prefer large corner pins for a larger or heavier board, substantial attached cooling hardware, or equipment expected to be inserted into and extracted from workcells repeatedly. The custom electronic load is such a repeated-use tool. Medium pins remain an option for compact, light assemblies with a compatible user scaffold. Document board dimensions, attached mass and leverage, handling frequency, selected pin/socket parts and the reason for the choice. Do not silently default every board to medium.++This is a qualitative design policy, not a measured strength or endurance rating. No universal board-size, mass or mating-cycle cutoff is established here; do not invent one or promise a cycle life. Confirm retention, insertion/extraction forces, tolerances and durability during mechanical qualification.++Recheck XY grid and actual socket locations, pin shoulder/tail seating, native footprint pads/drills, connector edge access, and the complete assembly envelope when changing size. Synchronize schematic, BOM, native PCB, STEP/GLB and footprint metadata. Re-run electrical, thermal, manufacturing and probing gates affected by the revision. Large corner pins do not establish compatibility with the probing tether's medium ground pin: retain a free matching ground contact unless that head/socket fit has separately been verified.+ ## Stacking: every machine pin into a machine contact, on every layer  A layout stacks base scaffold -> user scaffold -> molecule. Two rules hold on every layer (John, 2026-10-06):@@ -62,5 +70,4 @@ A layout stacks base scaffold -> user scaffold -> molecule. Two rules hold on ev  `adom-aiflow-probing stack` checks both from the real data (the base grid, the scaffold page's circuit.json, the molecule's footprint JSON, each layer's pin kind and the GLBs' own bounds) and names the exact position that fixes each problem.-`stack --fix` writes them into the layout. Look at a corner pin of each layer from the side in the twin (a pup-window or a Hydrogen webview) to confirm.+`stack --fix` writes them into the layout. Look at a corner pin of each layer from the side in the existing single Probing Workcell Hydrogen webview to confirm. Do not open another full simulator or a pup instance.