diff --git a/circle.json b/circle.json
index a6369f3..7d149fc 100644
--- a/circle.json
+++ b/circle.json
@@ -35,7 +35,7 @@
             "p": [
                 -6.0,
                 0.0,
-                0.0
+                -5.0
             ],
             "q": [
                 1.0,
@@ -45,8 +45,8 @@
             ],
             "name": "M00",
             "face_type": "symm",
-            "face_geometry": "parabola",
-            "face_f": 5.0,
+            "face_geometry": "circle",
+            "face_f": 1e10,
             "face_g": 1e10,
             "draw_material": "metal"
         },
@@ -206,7 +206,7 @@
             "p": [
                 0.0,
                 0.0,
-                0.0
+                -5.0
             ],
             "q": [
                 1.0,
@@ -225,7 +225,7 @@
             "p": [
                 0.0,
                 0.0,
-                0.0
+                -2.0
             ],
             "q": [
                 1.0,
diff --git a/circle.json.bak b/circle.json.bak
new file mode 100644
index 0000000..7d149fc
--- /dev/null
+++ b/circle.json.bak
@@ -0,0 +1,339 @@
+{
+    "p": [
+        0.0,
+        0.0,
+        0.0
+    ],
+    "q": [
+        1.0,
+        0.0,
+        0.0,
+        0.0
+    ],
+    "name": "",
+    "children": [
+        {
+            "p": [
+                -6.0,
+                0.0,
+                0.0
+            ],
+            "q": [
+                1.0,
+                0.0,
+                0.0,
+                0.0
+            ],
+            "name": "E0",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "nothing"
+        },
+        {
+            "p": [
+                -6.0,
+                0.0,
+                -5.0
+            ],
+            "q": [
+                1.0,
+                0.0,
+                0.0,
+                0.0
+            ],
+            "name": "M00",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                -6.0,
+                0.0,
+                0.0
+            ],
+            "q": [
+                1.0,
+                0.0,
+                0.0,
+                0.0
+            ],
+            "name": "M10",
+            "face_type": "symm",
+            "face_geometry": "parabola",
+            "face_f": 1.0,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                -6.0,
+                0.0,
+                -5.974533048268448
+            ],
+            "q": [
+                0.9238795325112867,
+                -0.0,
+                0.3826834323650898,
+                0.0
+            ],
+            "name": "M20",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                6.0,
+                0.0,
+                0.0
+            ],
+            "q": [
+                0.0,
+                0.0,
+                0.0,
+                1.0
+            ],
+            "name": "E1",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "nothing"
+        },
+        {
+            "p": [
+                6.0,
+                0.0,
+                0.0
+            ],
+            "q": [
+                0.0,
+                0.0,
+                0.0,
+                1.0
+            ],
+            "name": "M01",
+            "face_type": "symm",
+            "face_geometry": "parabola",
+            "face_f": 5.0,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                6.0,
+                0.0,
+                0.0
+            ],
+            "q": [
+                0.0,
+                0.0,
+                0.0,
+                1.0
+            ],
+            "name": "M11",
+            "face_type": "symm",
+            "face_geometry": "parabola",
+            "face_f": 1.0,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                6.0,
+                0.0,
+                -5.974533048268448
+            ],
+            "q": [
+                0.0,
+                -0.3826834323650898,
+                0.0,
+                0.9238795325112867
+            ],
+            "name": "M21",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                -1.9818052586129662,
+                0.0,
+                -5.974533048268448
+            ],
+            "q": [
+                0.9238795325112867,
+                0.0,
+                -0.3826834323650898,
+                0.0
+            ],
+            "name": "M30",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                1.9818052586129662,
+                0.0,
+                -5.974533048268448
+            ],
+            "q": [
+                0.9238795325112867,
+                -0.0,
+                0.3826834323650898,
+                0.0
+            ],
+            "name": "M31",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                0.0,
+                0.0,
+                -5.0
+            ],
+            "q": [
+                1.0,
+                0.0,
+                0.0,
+                0.0
+            ],
+            "name": "M6",
+            "face_type": "symm",
+            "face_geometry": "parabola",
+            "face_f": 5.0,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                0.0,
+                0.0,
+                -2.0
+            ],
+            "q": [
+                1.0,
+                0.0,
+                0.0,
+                0.0
+            ],
+            "name": "M7",
+            "face_type": "symm",
+            "face_geometry": "hyperbola",
+            "face_f": 1.0,
+            "face_g": -6.875220831710909,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                0.0,
+                0.0,
+                -7.875220831710909
+            ],
+            "q": [
+                1.0,
+                0.0,
+                0.0,
+                0.0
+            ],
+            "name": "D0",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                -1.9818052586129662,
+                0.0,
+                0.0
+            ],
+            "q": [
+                0.9238795325112867,
+                0.0,
+                -0.3826834323650898,
+                0.0
+            ],
+            "name": "M40",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                -1.0,
+                0.0,
+                0.0
+            ],
+            "q": [
+                0.9238795325112867,
+                -0.0,
+                0.3826834323650898,
+                0.0
+            ],
+            "name": "M50",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                1.9818052586129662,
+                0.0,
+                0.0
+            ],
+            "q": [
+                0.9238795325112867,
+                -0.0,
+                0.3826834323650898,
+                0.0
+            ],
+            "name": "M41",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        },
+        {
+            "p": [
+                1.0,
+                0.0,
+                0.0
+            ],
+            "q": [
+                0.9238795325112867,
+                0.0,
+                -0.3826834323650898,
+                0.0
+            ],
+            "name": "M51",
+            "face_type": "symm",
+            "face_geometry": "circle",
+            "face_f": 1e10,
+            "face_g": 1e10,
+            "draw_material": "metal"
+        }
+    ]
+}
\ No newline at end of file