Fleet: each Duplex has an EX 50 main and an EX 35 colour extruder

Correction from the user: the two Duplex systems are not in the
two-extruder configuration. Each runs two HRP 12 presses from an EX 50
main extruder with an EX 35 auxiliary extruder beside it for a second
colour; the Classic stays. Fleet still five presses. Updated in
pressing-line (table, phasing, re-quote: EX 50 vs the VEX 50 of the 2024
quote, and whether one EX 50 keeps both presses at full rate), scale,
total investment (wording; estimates unchanged), roadmap item 4, README.

docs/equipment/pressing-line.md

@@ -2,17 +2,17 @@
 
 ## Current plan: an all-Newbilt fleet of five presses (October 2026)
 
-Two **Newbilt Duplex** systems, each in Newbilt's two-extruder
-configuration (two HRP 12 presses, each fed by its own extruder, on one
-hydraulic unit with shared control), plus one **Newbilt Classic** fully
-automatic press:
+Two **Newbilt Duplex** systems, each with two HRP 12 presses on one
+hydraulic unit, fed by an **EX 50** main extruder with an **EX 35**
+auxiliary extruder beside it for a second colour, plus one **Newbilt
+Classic** fully automatic press:
 
 | | Presses | Extruders | Hydraulics |
 |---|---|---|---|
-| Duplex system 1 | 2 semi-automatic | 2 | one unit for the system |
-| Duplex system 2 | 2 semi-automatic | 2 | one unit for the system |
-| Classic | 1 fully automatic | 1, built in | its own |
-| **Fleet** | **5: 4 semi-automatic, 1 automatic** | **5** | |
+| Duplex system 1 | 2 semi-automatic | EX 50 main + EX 35 colour | one unit for the system |
+| Duplex system 2 | 2 semi-automatic | EX 50 main + EX 35 colour | one unit for the system |
+| Classic | 1 fully automatic | built in | its own |
+| **Fleet** | **5: 4 semi-automatic, 1 automatic** | **2 EX 50, 2 EX 35, 1 built in** | |
 
 This replaces the earlier target of a 50/50 split between automated and
 semi-automatic presses (two of each, with the Pheenix AD12 as the
@@ -21,11 +21,10 @@ automated candidate). What it means:
 - **The semi-automatic side carries most of the volume.** Splatter and
   other colour effects, special editions and small runs are where an
   operator working the mould is an advantage rather than a cost, and
-  Newbilt itself recommends the Duplex for splatter. With an extruder per
-  press, the two presses of a system can run different colours or
-  compounds at the same time and neither waits on a shared extruder (our
-  reading of the flyer's configurations; confirm with Newbilt). The
-  Classic takes the long standard runs.
+  Newbilt itself recommends the Duplex for splatter, and the EX 35 on
+  each system adds the second colour strand for splatter, marble and
+  half-and-half work, which is what the flyer offers it for. The Classic
+  takes the long standard runs.
 - **One vendor, one mould family.** Classic and Duplex share insert sets
   (below), so the whole fleet runs one family of moulds and spares and one
   service relationship. The single-vendor risk is the same one the Pheenix
@@ -33,7 +32,7 @@ automated candidate). What it means:
 - **Phasing.** The Newbilt Single 2.1 system of the 2024 quote (one press,
   one extruder) is the launch configuration and the first half of Duplex
   system 1: its hydraulic aggregate is already sized for the second press.
-  The second press and extruder complete system 1; system 2 and the
+  The second press and the EX 35 complete system 1; system 2 and the
   Classic complete the fleet ([scale](../scale.md) capacity table,
   [roadmap](../roadmap.md) item 24).
 - **Capacity** at maturity stays at ~1.0 to 1.5 million records a year on
@@ -51,9 +50,12 @@ automated candidate). What it means:
 - **Investment**: the fleet change is carried in the added-scope table of
   [total investment](../finance/total-investment.md) until the next
   re-base.
-- **For the re-quote** ([roadmap](../roadmap.md) item 4): the two-extruder
-  Duplex as an upgrade of the Single 2.1 and as a second complete system;
-  the Classic's price, weight, power, steam and cooling figures; and a
+- **For the re-quote** ([roadmap](../roadmap.md) item 4): the Duplex with
+  an EX 50 and an EX 35 as an upgrade of the Single 2.1 and as a second
+  complete system, and whether the EX 50 is the VEX 50 of the 2024 quote;
+  whether one EX 50 keeps both presses of a system at full rate (the
+  flyer's Duplex main configuration runs two presses on one extruder); the
+  Classic's price, weight, power, steam and cooling figures; and a
   central hydraulic supply shared by both Duplex systems (an option the
   flyer offers).
 
@@ -120,7 +122,8 @@ What this changes in the plan:
   option; it changes the machine-floor layout and the utility list in
   [scale.md](../scale.md).
 - **Colour effects.** The EX 35 is the add-on for multi-colour work on the
-  semi-automatic side. It is not in the 2024 quote.
+  semi-automatic side. It is not in the 2024 quote; the current plan has
+  one per Duplex system.
 - **For the re-quote**, where sources disagree: the Classic's operator panel
   (two 21" touchscreens in the 2024 flyer, one 10" on the Newbilt website);
   its built-in extruder power (7.5 kW, 400 V drive motor in the 2024 flyer,