# C1256 — Generate the full finite placement field

## Question

How do thethree source switches produce the405 envelope?

## Inputs

```json
{
  "T": 60,
  "C": 130,
  "S": 215
}
```

## Sources

```json
[
  "C1253",
  "Strategy §4.1",
  "File07 §2.11.1a"
]
```

## Opened utc

2026-09-28T05:45:32.030891+00:00

## Results

```json
{
  "placement_field": {
    "path": "model/regular_kernel_eight_state_field.json",
    "sha256": "b72b31629e31996bd0e090a0f1833f4f5a3361ea610ca8d600d0a91ba1ebef43",
    "bytes": 1037
  },
  "offsets": [
    0,
    60,
    130,
    190,
    215,
    275,
    345,
    405
  ],
  "gaps": [
    60,
    70,
    60,
    25,
    60,
    70,
    60
  ]
}
```

## Finding

The completefield is0,60,130,190,215,275,345,405, with60|70|60|25|60|70|60 spacings. Its405 width comes fromT+C+S, independently of thecoefficientfive formula.

## Reassessment

Distinguish thetwo different four-state restrictions that source summaries use.

## Checks

```json
{
  "eight_distinct": true,
  "width405": true,
  "spacing": true
}
```

## Closed utc

2026-09-28T05:45:32.031407+00:00

## Record provenance

Exact record hash: `8c7738cd9781e1ad93c18a0353a16161b968b64bfedfa7dd888503fa7f2b7ff8`

Source journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`