diff --git a/src/components/ChartPanel.jsx b/src/components/ChartPanel.jsx
index e3be686..7026c6b 100644
--- a/src/components/ChartPanel.jsx
+++ b/src/components/ChartPanel.jsx
@@ -28,11 +28,12 @@ export default function ChartPanel({ district, state }) {
         }
         setNationalRates(nat)
 
-        // Fetch all 3 waves × default model (unified_m2_mod) for Chart 1 + Charts 2-3
+        // Fetch all 3 waves × three-year model (unified_m3_mod) for Chart 1 + Charts 2-3
+        // Three-year models return observed data for all waves
         const waves = ['21-22', '17-18', '15-16']
         const waveData = {}
         await Promise.all(waves.map(async (year) => {
-          try { waveData[year] = await api.fetchDistrictEstimates(district.leaid, { model: 'unified_m2_mod', year }) } catch(e) {} 
+          try { waveData[year] = await api.fetchDistrictEstimates(district.leaid, { model: 'unified_m3_mod', year }) } catch(e) {} 
         }))
 
         // Fetch all 4 quadrant models for Charts 4-6 (8 groups × 4 models, but we batch by model)