• 1.4 baseline — 0.6 × season 1.3 (15 gm) + 0.4 × last 10 1.4
• +0.0 opponent leak — they concede 35.9/game vs a 35.3 league average
• +2.6 at this ground — averages 4 there (40 gm)
• vs them: averages 5.0 over 8 games — evidence, never summed

Derived, not measured — plain arithmetic over his real games, shown in full. Adjustments can overlap (a game at this ground can also be a wet one); they add simply, and this note is the admission. Opening Round: 6 — far outside his usual range; kept in the average, not smoothed away.