docs(2-bm): home the energy-cal rotary-stage conflict in STAGE-5 (ENERGY-7 cross-link)

docs/deployments/2-bm/questions.md

@@ -66,7 +66,7 @@ These rows confirm vendor models, datasheets, and travel limits for the sample-s
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 | STAGE-2 | `Nice-to-have` | A datasheet PDF for the Kohzu CYAT-070 alignment stages (`SampleTop_X` / `SampleTop_Z`)? The part number and key specs are on the components page; we just have no datasheet on file. Also: our docs quote 15 mm of travel each way, but CORA records 10 mm each way (`-10..10 mm`); which is right? | `Kohzu CYAT-070`, no datasheet on file; travel -10..10 mm (docs say 15 mm each way) | yes | [Engineering drawings](inventory.md#engineering-drawings) |
 | STAGE-4 | `Nice-to-have` | The measured motor-sensitivity constants (K_roll, K_pitch) that link a hexapod tilt to the observed image-centroid shift? Today they are re-derived per alignment rather than stored. | derived in-procedure, not persisted | not yet | [Procedures](procedures.md) |
-| STAGE-5 | `Nice-to-have` | The rotation stage belongs to a documented kit (`ABRS-250MP-M-AS` installed, plus `ABRS-150MP-M-AS` and the `ABS2000-1000AS-RU` spindle per the [sample motor stack page](https://docs2bm.readthedocs.io/en/latest/source/ops/item_050.html), `item_050`). Is the rotary actually SWAPPED per experiment at 2-BM-B today, or is `ABRS-250MP-M-AS` the single installed stage with the others historical / per-station? And which mode label (`fast tomo` / `mona tomo` / `spindle`) maps to which stage in the current setup? (Source labels conflict pre vs post APS-U.) | one installed (`ABRS-250MP-M-AS`); kit not actively swapped | yes | [Vendor catalog](inventory.md#vendor-catalog) |
+| STAGE-5 | `Nice-to-have` | The rotation stage belongs to a documented kit (`ABRS-250MP-M-AS` installed, plus `ABRS-150MP-M-AS` and the `ABS2000-1000AS-RU` spindle per the [sample motor stack page](https://docs2bm.readthedocs.io/en/latest/source/ops/item_050.html), `item_050`). Is the rotary actually SWAPPED per experiment at 2-BM-B today, or is `ABRS-250MP-M-AS` the single installed stage with the others historical / per-station? And which mode label (`fast tomo` / `mona tomo` / `spindle`) maps to which stage in the current setup? (Source labels conflict pre vs post APS-U.) **New evidence to reconcile:** the ENERGY-7 channel-cut answer (#256) says its calibration crystal is rocked on an `ABRS-150MP`, while the installed sample rotary is the serial-numbered `ABRS-250MP-M-AS` (`S/N 146853-A-1-1-X`, STAGE-3 / #164). Is the 150MP genuinely mounted for energy calibration (a real kit swap), or is that a slip for the installed 250MP? | one installed (`ABRS-250MP-M-AS`); kit not actively swapped | yes | [Vendor catalog](inventory.md#vendor-catalog) |
 | STAGE-6 | `Nice-to-have` | The exact Kohzu model of the laminography-pitch / swivel stage (`LaminographyPitch`, `2bmb:m49`)? CORA uses `SA16A-RM`; the source swivel kit also lists `SA16A-RS` and `SA07A-R2L`. | `Kohzu SA16A-RM` | yes | [Vendor catalog](inventory.md#vendor-catalog) |
 | STAGE-10 | `Nice-to-have` | Confirm the `Rotary` encoder resolution. `item_050`'s Ensemble encoder table gives 532800 pulses/rev (11840 lines/rev x 45 scale factor) = 0.000676 deg/count for the ABRS-250MP; CORA now records that, replacing an earlier unsourced `0.0001 deg`. The 11840 lines/rev fundamental is confirmed by the ABRS datasheet (#164); still open is whether the Ensemble applies the x45 or a further electronic multiplication to reach the operational count. | `0.000676 deg` from item_050; 11840 lines/rev datasheet-confirmed (#164) | yes (awaiting Ensemble-multiplication confirmation) | [Settings](inventory.md#settings) |
 
@@ -102,7 +102,7 @@ On an energy change the DMM monochromator, its Bragg arms, and the tracking slit
 
 | ID | Priority | Question | CORA assumes | Already done? | Resolves |
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-| ENERGY-7 | `Nice-to-have` | Channel-cut energy calibration is confirmed current practice (2d = 3.84 angstrom, 36 x 3 mm removable crystal, modelled as a calibration Subject). Two residual confirms: (a) the answer names the rocking stage as an Aerotech **ABRS-150MP**, but CORA's `Rotary` is an **ABRS-250MP** (datasheet-confirmed, #164): is the crystal rocked on that same sample rotation stage, and is its model 150MP or 250MP? (b) explicit confirmation the crystal is **Si(220)** (only Si(220) matches 2d = 3.84) and how often calibration is re-run. | calibration + 2d + removable confirmed (#256); rocking-stage model (150 vs 250 MP) + Si(220) + re-run cadence open | partly | [Procedures](procedures.md) |
+| ENERGY-7 | `Nice-to-have` | Channel-cut energy calibration is confirmed current practice (2d = 3.84 angstrom, 36 x 3 mm removable crystal, modelled as a calibration Subject). Residual confirms: explicit confirmation the crystal is **Si(220)** (only Si(220) matches 2d = 3.84) and how often calibration is re-run. (The rocking-stage model question, ABRS-150MP vs the installed 250MP, is folded into STAGE-5, the rotary-kit-swap question.) | calibration + 2d + removable confirmed (#256); Si(220) + re-run cadence open | partly | [Procedures](procedures.md) |
 
 ## Beam mode