• 0.5 baseline — 0.6 × season 0.5 (13 gm) + 0.4 × last 10 0.5
• +0.0 opponent leak — they concede 33.7/game vs a 32.8 league average
• −0.2 at this ground — averages 0.3 there (15 gm)
• wet forecast: too thin to count (3 gm) — shown, adds nothing
• vs them: averages 1.5 over 4 games — evidence, never summed

Most signals here point under while you're on the over — worth reading the working above before you commit.

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. Round 4: 4 — far outside his usual range; kept in the average, not smoothed away.