diff --git a/D03_PlanAnalysis/D03_PlanAnalysis_UI_DrawPaint.ts b/D03_PlanAnalysis/D03_PlanAnalysis_UI_DrawPaint.ts
index 87f532158..b1890160e 100644
--- a/D03_PlanAnalysis/D03_PlanAnalysis_UI_DrawPaint.ts
+++ b/D03_PlanAnalysis/D03_PlanAnalysis_UI_DrawPaint.ts
@@ -43,7 +43,7 @@ export function strokeCased(
   dash: number[] = [],
 ): void {
   context.setLineDash(dash);
-  context.lineWidth = width + 3;
+  context.lineWidth = width + 4;
   context.strokeStyle = planColors().casing;
   context.stroke();
   context.lineWidth = width;
diff --git a/D03_PlanAnalysis/D03_PlanAnalysis_UI_Map.ts b/D03_PlanAnalysis/D03_PlanAnalysis_UI_Map.ts
index ee67d6a4d..0681865f2 100644
--- a/D03_PlanAnalysis/D03_PlanAnalysis_UI_Map.ts
+++ b/D03_PlanAnalysis/D03_PlanAnalysis_UI_Map.ts
@@ -56,7 +56,7 @@ export function planColors(): {
     active: themeColor("--draw-map-sketch", "#ffe94d"),
     warn: themeColor("--draw-map-warn", "#ff5a4d"),
     measure: themeColor("--draw-map-measure", "#ffffff"),
-    casing: "rgba(0, 0, 0, 0.85)",
+    casing: "rgba(0, 0, 0, 0.9)",
     halo: "rgba(0, 0, 0, 0.65)",
   };
 }
diff --git a/resources/tester/test_600_3_zoom_limit.py b/resources/tester/test_600_3_zoom_limit.py
new file mode 100644
index 000000000..13c5b4b61
--- /dev/null
+++ b/resources/tester/test_600_3_zoom_limit.py
@@ -0,0 +1,31 @@
+"""600-3 줌아웃 한도 인자 지킴 — 휠 부품 하한은 인자가 있을 때만 바뀜(B05 · 추천 지도는 안 줌 = 0.5 그대로).
+
+./venv/Scripts/python.exe -m pytest resources/tester/test_600_3_zoom_limit.py -q
+"""
+
+import re
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+read = lambda rel: (ROOT / rel).read_text(encoding="utf-8")  # noqa: E731
+
+INPUT = read("B05_Profile/B05_Profile_UI_RouteEdit_Input.ts")
+
+
+def test_하한_기본은_0_5():
+    assert re.search(r"const MIN_SCALE = 0\.5;", INPUT)
+    assert "params.minScale?.() ?? MIN_SCALE" in INPUT
+
+
+def test_B05_는_하한_인자를_안_줌():
+    for rel in (
+        "B05_Profile/B05_Profile_UI_RouteEdit.ts",
+        "B05_Profile/B05_Profile_UI_RouteEdit_Recommend_Map.ts",
+    ):
+        assert "minScale" not in read(rel), rel
+
+
+def test_예정노선만_한반도_폭을_줌():
+    plan = read("D03_PlanAnalysis/D03_PlanAnalysis_UI_Map.ts")
+    assert "MAP_MAX_VIEW_WIDTH_M = 600_000" in plan
+    assert "minScale:" in plan