• 0.5 baseline — 0.6 × season 0.7 (19 gm) + 0.4 × last 10 0.3
• +0.0 opponent leak — they concede 38.8/game vs a 35.7 league average
• −0.0 wet forecast — averages 0.5 in the wet (4 gm)
• vs them: averages 0.3 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.