Specials share 60 %+: revenue model, calculator and business plan re-based

User (October 2026): "lets say 60+% special prints" (the plant focuses on
special prints, not mono colours).

- Specials (splatter, marble, colour effects) run only on the Duplex
  systems, so at 60 % the Duplex sets the launch plant's output: ~0.58 /
  0.74 / 0.90M records a year (was 0.71 / 0.84 / 0.97 at ~20 %), the
  Classic at about two thirds load. Full 60/40 hall: ~2.3 to 3.6M (Duplex
  -limited, Classics about half loaded); five-press fleet unchanged. A
  hall balanced by output at 60 % would give Duplex ~70 to 75 % of the
  floor (estimate; noted, not applied).
- Blended price 3.76 / 4.49 / 5.27 USD (standard 3.40 / 3.80 / 4.25 plus
  the 0.60 / 1.15 / 1.70 specials premium on 60 %). Launch operating
  picture: revenue 2.28 / 3.65 / 5.41M USD, EBITDA 0.23 / 1.73 / 3.79M,
  operating profit -0.66 / 1.21 / 3.46M, payback ~3.8 yr central,
  break-even ~0.25M records; adverse needs ~1.1M records to cover
  depreciation. Specials' extra direct cost (coloured compound, purge,
  trim only into black) is not in the cost table yet: flagged as an
  upper bound until compound quotes.
- Calculator default specials share 20 -> 60 % (planning rates keep the
  launch plant balanced at 850k: revenue 4.14M, EBITDA 2.07M, payback
  3.3 yr, cash payback year ~4.8, IRR ~18 %).
- revenue-model.md, scale.md, pressing-line.md, README; business plan
  draft 0.2 rebuilt (sections 1, 4, 9, risks).

Checks: calculator regression 0 fails, no page errors, node --check on
all scripts; PDF 47 pages, table of contents filled; no em dashes added.

docs/fleet-calculator.html

@@ -658,7 +658,7 @@ html[data-theme=light] .iso-svg .iso-glint { display: inline; }
         </div>
         <p class="hint">The output is what this fleet makes at the set effectiveness and specials share.</p>
       </div>
-      <label class="row" style="margin-top:14px"><span>Splatter and specials, share of output</span><b id="specV"></b></label>
+      <label class="row" style="margin-top:14px"><span>Splatter and specials, share of output<br><small>plan: 60 % and more; specials run only on Duplex systems</small></span><b id="specV"></b></label>
       <input type="range" id="spec" min="0" max="100" step="1" aria-label="Specials share">
       <p class="hint">Splatter, multi-colour and effect records run only on the Duplex, with
         its EX 35 colour extruder (Newbilt recommends the Duplex for splatter). Black and
@@ -2836,7 +2836,8 @@ html[data-theme=light] .iso-svg .iso-glint { display: inline; }
 "use strict";
 // ---------------------------------------------------------------- inputs
 const S0 = {
-  mode: "target", target: 850000, spec: 20, grow: "classic", dMin: 1, cMin: 1,
+  // specials share 60 % (user, October 2026: the plant focuses on special prints, 60 %+)
+  mode: "target", target: 850000, spec: 60, grow: "classic", dMin: 1, cMin: 1,
   dFleet: 1, cFleet: 1, shifts: 2, hrs: 8, days: 300, eff: 65, rateD: 3, rateC: 2, specF: 100,
   priceStd: 3.8, premSpec: 1.15, titleFee: 1155, cur: "USD", boi: "on", exportShare: 70, capexEnd: "mid",
   // plant configuration (defaults = the launch plant, total-investment.md October 2026)