# C868 — Transport the complete NT fork to the second rail

## Question

Does moving both hinge and display preserve every Key radius?

## Inputs

```json
{
  "old_hinge_BC": 6,
  "new_hinge_BC": 36
}
```

## Sources

```json
[
  "File43 rail36",
  "File54 Enoch fork",
  "C866–867"
]
```

## Opened utc

2026-09-28T02:44:52.667020+00:00

## Results

```json
{
  "translated_returns": {
    "path": "model/NT_36BC_rail_returns.json",
    "sha256": "17f7a1fd328c63476e6ad5c6c76eda6f800ea34f63d9a0470af4b40ece161565",
    "bytes": 868
  },
  "Enoch": [
    {
      "key": "E",
      "source": "Enoch",
      "image": "Creation of Adam",
      "source_BC": 4866,
      "image_BC": 5286,
      "old_image_plus30": 5286
    },
    {
      "key": "P",
      "source": "Enoch",
      "image": "Jared",
      "source_BC": 4866,
      "image_BC": 4936,
      "old_image_plus30": 4936
    }
  ]
}
```

## Finding

Moving the whole display and hinge by30BC preserves every radius and Key index. The source fork becomes4866→5286/4936. This is whole-frame covariance, distinct from an isolated MT apparent-age adjustment.

## Reassessment

Construct the entire common49/70 coarsening of the primary span.

## Checks

```json
{
  "all_images": true,
  "six_rows": true
}
```

## Closed utc

2026-09-28T02:44:52.667545+00:00

## Record provenance

Exact record hash: `9a5ee3519b97a41fa59f8de443ed94a569821a97a15e65f6031c8db5acc5378d`

Source journal: `Research_Cycles/C0832_C0931/journal.json`