diff --git a/bin/oref0-autotune.sh b/bin/oref0-autotune.sh
index 407b89391..e9894b93b 100755
--- a/bin/oref0-autotune.sh
+++ b/bin/oref0-autotune.sh
@@ -252,7 +252,12 @@ do
         fi
     else
         # Copy tuned profile produced by autotune to profile.json for use with next day of data
-        cp newprofile.$i.json profile.json
+        if cat newprofile.$i.json | jq . | grep -q start; then
+            cp newprofile.$i.json profile.json
+        else
+            jq -c newprofile.$i.json
+            die "newprofile.$i.json invalid"
+        fi
     fi
 
 
diff --git a/lib/determine-basal/determine-basal.js b/lib/determine-basal/determine-basal.js
index 2c12ad2fb..599dd8abe 100644
--- a/lib/determine-basal/determine-basal.js
+++ b/lib/determine-basal/determine-basal.js
@@ -439,14 +439,22 @@ var determine_basal = function determine_basal(glucose_status, currenttemp, iob_
     ci = round((minDelta - bgi),1);
     var uci = round((minDelta - bgi),1);
     // ISF (mg/dL/U) / CR (g/U) = CSF (mg/dL/g)
-    if (profile.temptargetSet) {
+
+    // TODO: remove commented-out code for old behavior
+    //if (profile.temptargetSet) {
         // if temptargetSet, use unadjusted profile.sens to allow activity mode sensitivityRatio to adjust CR
-        var csf = profile.sens / profile.carb_ratio;
-    } else {
+        //var csf = profile.sens / profile.carb_ratio;
+    //} else {
         // otherwise, use autosens-adjusted sens to counteract autosens meal insulin dosing adjustments
         // so that autotuned CR is still in effect even when basals and ISF are being adjusted by autosens
-        csf = sens / profile.carb_ratio;
-    }
+        //var csf = sens / profile.carb_ratio;
+    //}
+    // use autosens-adjusted sens to counteract autosens meal insulin dosing adjustments so that
+    // autotuned CR is still in effect even when basals and ISF are being adjusted by TT or autosens
+    // this avoids overdosing insulin for large meals when low temp targets are active
+    csf = sens / profile.carb_ratio;
+    console.error("profile.sens:",profile.sens,"sens:",sens,"CSF:",csf);
+
     var maxCarbAbsorptionRate = 30; // g/h; maximum rate to assume carbs will absorb if no CI observed
     // limit Carb Impact to maxCarbAbsorptionRate * csf in mg/dL per 5m
     var maxCI = round(maxCarbAbsorptionRate*csf*5/60,1)