diff --git a/README.md b/README.md
index 3fa1f11..bebe1df 100644
--- a/README.md
+++ b/README.md
@@ -229,6 +229,7 @@ docs/
 │   ├── sibert/            Stamper prep specifications and line-up drawing
 │   │                      (2021 issues in specs-2021/), 2008-09
 │   │                      optical-disc literature (vendor PDFs)
+│   ├── duplex-cell-layout-sketch.png  Duplex cell arrangement (sketch, not to scale)
 │   ├── galvanics.md       Electroforming and stamper prep equipment plan
 │   └── pressing-line.md   Press fleet strategy and equipment plan
 ├── finance/               Project cost overviews, revenue model,
diff --git a/docs/equipment/duplex-cell-layout-sketch.png b/docs/equipment/duplex-cell-layout-sketch.png
new file mode 100644
index 0000000..6064de5
Binary files /dev/null and b/docs/equipment/duplex-cell-layout-sketch.png differ
diff --git a/docs/equipment/pressing-line.md b/docs/equipment/pressing-line.md
index ec34e6c..ee1ff2b 100644
--- a/docs/equipment/pressing-line.md
+++ b/docs/equipment/pressing-line.md
@@ -46,6 +46,21 @@ automated candidate). What it means:
   trench along the press rows. Open for the re-quote (below): whether the
   Single 2.1's own aggregate becomes part of the central plant or a
   standby, and whether the Classic can run from it.
+- **Cell layout (October 2026).** Each Duplex system is one operator's
+  cell, as sketched in [duplex-cell-layout-sketch.png](duplex-cell-layout-sketch.png)
+  (arrangement only, not to scale):
+  - the operator stands in the middle, with the two presses either side
+    turned 45° towards him;
+  - the EX 50 and the EX 35 stand side by side behind him, between the
+    presses;
+  - one trimmer per cell stands in front of him on the left.
+
+  At Newbilt's sizes (site requirements p. 10: press footprint about
+  0.9 m², extruder about 0.5 m², room to walk around every machine, at
+  least 60 cm to walls) the cell is about 5 × 3 m, with 0.6 to 0.8 m
+  between machines. The EX 35 and trimmer footprints are not published,
+  so those are estimates. The [Payap scenario model](../site-candidates.md#payap-scenario-model-october-2026) draws
+  both systems this way.
 - **Room to grow: possibly ten more Classics.** The plant may add up to
   ten more Newbilt Classics at some point. This is an option, not part of
   the plan or the investment: the layout keeps floor for it (ten Classic
@@ -179,7 +194,12 @@ electrical load, saturated steam at 10 bar, and compressed air and cooling
 water circuits, plus side rooms for materials, compressor, chiller, and
 finished goods. These are per Duplex system: the current fleet needs two,
 plus floor for the Classic (~400 m², plus ~50 to 75 m² for the Classic,
-estimate).
+estimate). The machines themselves are small: a press is about 0.9 m², an
+extruder about 0.5 m², and the hydraulic aggregate about 1.0 m², which
+Newbilt prefers outside the pressing room; the minimum room height is
+2.5 m. Most of the 200 m² is walking, handling and side-room space. The
+layout drawing that page 11 of the site requirements refers to is not in
+our copy; ask for it with the re-quote.
 
 **Floor loading is a building-selection criterion**: the slab must carry
 multiple tons per m² in the machine areas. A Newbilt press weighs 1,350 kg