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/roadmap.md

@@ -41,7 +41,8 @@ These three run in parallel and gate everything downstream:
 ## Phase 1: Quotes and site (parallel with the BOI decision window)
 
 4. **Newbilt re-quote** (2024 offer expired) for the current fleet: the
-   two-extruder Duplex as the Single 2.1 upgrade and as a second system,
+   Duplex with an EX 50 and an EX 35 as the Single 2.1 upgrade and as a
+   second system,
    the Classic automatic press, and a central hydraulic supply option
    ([pressing line](equipment/pressing-line.md)), with PLC/data access as a
    stated purchasing requirement per the