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.

README.md

@@ -73,8 +73,9 @@ The detail lives in dedicated documents:
   three current gates (market validation, BOI, land title check) through
   quotes, commitment, build, launch, and expansion
 - [Pressing line equipment plan](docs/equipment/pressing-line.md): the
-  current all-Newbilt fleet (two Duplex systems with an extruder per press,
-  plus one Classic automatic press), the 2024 Newbilt quote (~USD 232k,
+  current all-Newbilt fleet (two Duplex systems, each with an EX 50 main
+  and an EX 35 colour extruder, plus one Classic automatic press), the 2024
+  Newbilt quote (~USD 232k,
   expired), the 2026 product flyers, and site requirements
 - [Galvanics and stamper prep equipment plan](docs/equipment/galvanics.md):
   the metal path from lacquer to press-ready stamper, from vendor