diff --git a/prototype/circles.py b/prototype/circles.py
index 3d6414f..a8b2b7d 100644
--- a/prototype/circles.py
+++ b/prototype/circles.py
@@ -166,8 +166,10 @@ class PlateLayout:
         # compute coordinates and various measurements for fixed radii of plate and tubes
         self.target_plate_radius = 160.0
         self.target_center_hole_radius = 7.5
-        self.target_radius_1 = 50.5
+        self.target_radius_1 = 50.5 # should be 50 mm according to data sheet but in fact its a bit more than that..
+        self.target_radius_1_inner = 94.0/2.0
         self.target_radius_2 = 20.0
+        self.target_radius_2_inner = 34.0/2.0
         teeth = 200
 
         D = 2 * self.target_plate_radius
@@ -296,7 +298,7 @@ class PlateLayout:
             self.tube_1_cuts[k]['tangent_point'] = t1
             self.tube_1_cuts[k]['angle_deg'] = angle1_deg
             self.tube_1_cuts[k]['length'] = dispenser_1_outer_diameter_small
-            self.tube_1_cuts[k]['width'] = 5.0
+            self.tube_1_cuts[k]['width'] = 4.0
 
             plt.plot(cut_center[0], cut_center[1], 'o')
 
@@ -355,7 +357,7 @@ class PlateLayout:
             self.tube_2_cuts[k]['tangent_point'] = t1
             self.tube_2_cuts[k]['angle_deg'] = angle1_deg
             self.tube_2_cuts[k]['length'] = dispenser_2_outer_diameter_small
-            self.tube_2_cuts[k]['width'] = 5.0
+            self.tube_2_cuts[k]['width'] = 4.0
 
             plt.plot(cut_center[0], cut_center[1], 'o')
 
@@ -410,7 +412,24 @@ class PlateLayout:
         if output_all:
             f_lines = self.output_whole(f_lines)
         else:
-            f_lines = self.output_segment(f_lines, 2, split_at_big_circles=False)
+            f_lines += '<g>\n'
+            f_lines = self.output_segment(f_lines, 2, split_at_big_circles=True)
+            f_lines += '</g>\n'
+
+        # output other parts
+        r = np.linalg.norm(self.tube_1_coords[0]) - self.target_radius_1
+        f_lines += '<g>\n'
+        f_lines += svg_circle('1', 'center_ring_clamp', (0,0), r)
+        f_lines += svg_circle('2', 'center_ring_clamp', (0,0), self.target_center_hole_radius)
+        height = 5.0
+        width = 40.0
+        f_lines += svg_rect(x=-width/2.0, y=-height/2.0, width=width, height=height)
+        f_lines += '</g>\n'
+
+        f_lines += '<g>\n'
+        f_lines += svg_circle('1', 'center_ring', (0,0), r)
+        f_lines += svg_circle('2', 'center_ring', (0,0), self.target_center_hole_radius)
+        f_lines += '</g>\n'
 
         f_lines.append('</svg>\n')
 
@@ -419,6 +438,10 @@ class PlateLayout:
         fw.writelines(f_lines)
         fw.close()
 
+
+
+
+
         pass
 
 
@@ -454,13 +477,13 @@ class PlateLayout:
             f_lines += svg_gear_marking(self.tube_1_tangents[k_next], self.tube_1_coords[k_next])
 
             # cutout rectangle for big circles
-            f_lines += svg_rectangle(k_next, 'cut', self.tube_1_cuts[k_next])
+            f_lines += svg_rect_trans(k_next, 'cut', self.tube_1_cuts[k_next])
 
             # gear pos for small circle
             f_lines += svg_gear_marking(self.tube_2_tangents[k], self.tube_2_coords[k])
 
             # cutout rectangle for small circles
-            f_lines += svg_rectangle(k, 'cut', self.tube_2_cuts[k])
+            f_lines += svg_rect_trans(k, 'cut', self.tube_2_cuts[k])
 
             # first segment border
             f_lines += svg_segment_border_inner(self.tube_1_angles[k], self.target_center_hole_radius,
@@ -501,38 +524,38 @@ class PlateLayout:
             f_lines += svg_arc(p1, p2, self.target_center_hole_radius, 0, 1)
 
             # small circles arcs
-            f_lines += svg_half_circle(k, 'small circle', self.tube_2_coords[k], self.target_radius_2,
+            f_lines += svg_half_circle(k, 'small circle', self.tube_2_coords[k], self.target_radius_2_inner,
                                        self.tube_2_angles[k])
-            f_lines += svg_half_circle(k_next, 'small circle', self.tube_2_coords[k_next], self.target_radius_2,
+            f_lines += svg_half_circle(k_next, 'small circle', self.tube_2_coords[k_next], self.target_radius_2_inner,
                                        self.tube_2_angles[k_next], orientation_flag=0)
 
             # big circle
-            f_lines += svg_circle(k, 'big circle', self.tube_1_coords[k_next], self.target_radius_1)
+            f_lines += svg_circle(k, 'big circle', self.tube_1_coords[k_next], self.target_radius_1_inner)
 
             # gear pos for big circle
             f_lines += svg_gear_marking(self.tube_1_tangents[k_next], self.tube_1_coords[k_next])
 
             # cutout rectangle for big circles
-            f_lines += svg_rectangle(k, 'cut', self.tube_1_cuts[k_next])
-            f_lines += svg_rectangle(k, 'cut', self.tube_1_cuts[k_next_next])
+            f_lines += svg_rect_trans(k, 'cut', self.tube_1_cuts[k_next])
+            f_lines += svg_rect_trans(k, 'cut', self.tube_1_cuts[k_next_next])
 
             # gear pos for small circle
             f_lines += svg_gear_marking(self.tube_2_tangents[k_next], self.tube_2_coords[k_next])
 
             # cutout rectangle for small circles
-            f_lines += svg_rectangle(k_next, 'cut', self.tube_2_cuts[k_next])
+            f_lines += svg_rect_trans(k_next, 'cut', self.tube_2_cuts[k_next])
 
             # first segment border
             f_lines += svg_segment_border_inner(self.tube_2_angles[k], self.target_center_hole_radius,
-                                                self.tube_2_coords[k], self.target_radius_2, puzzle_scale=0.5, placement=0.25)
+                                                self.tube_2_coords[k], self.target_radius_2_inner, puzzle_scale=0.5, placement=0.25)
             f_lines += svg_segment_border_outer(self.tube_2_angles[k], self.target_plate_radius, self.plate_module,
-                                                self.tube_2_coords[k], self.target_radius_2)
+                                                self.tube_2_coords[k], self.target_radius_2_inner)
 
             # second segment border
             f_lines += svg_segment_border_inner(self.tube_2_angles[k_next], self.target_center_hole_radius,
-                                                self.tube_2_coords[k_next], self.target_radius_2, puzzle_scale=0.5, placement=0.25)
+                                                self.tube_2_coords[k_next], self.target_radius_2_inner, puzzle_scale=0.5, placement=0.25)
             f_lines += svg_segment_border_outer(self.tube_2_angles[k_next], self.target_plate_radius, self.plate_module,
-                                                self.tube_2_coords[k_next], self.target_radius_2)
+                                                self.tube_2_coords[k_next], self.target_radius_2_inner)
 
 
             # find outmost points for segment cut lines
@@ -629,13 +652,13 @@ class PlateLayout:
 
         # output cuts for big circles
         for k, c in self.tube_1_cuts.items():
-            text = svg_rectangle(k, 'cut', c['center'], c['length'], c['width'], c['angle_deg'])
+            text = svg_rect_trans(k, 'cut', c)
             f_lines = f_lines + text
             pass
 
         # output cuts for small circles
         for k, c in self.tube_2_cuts.items():
-            text = svg_rectangle(k, 'cut', c['center'], c['length'], c['width'], c['angle_deg'])
+            text = svg_rect_trans(k, 'cut', c)
             f_lines = f_lines + text
             pass
 
diff --git a/prototype/notes.txt b/prototype/notes.txt
index f96c031..9e0cb63 100644
--- a/prototype/notes.txt
+++ b/prototype/notes.txt
@@ -10,12 +10,15 @@ Important: SVG produced by python script needs to be openend, transformed and sa
 In progress:
 
 
-TODO: 
+TODO:
+- add displacement between gear cuts and circles to have more stability at the cuts
 - second ring above the first plate to fix the containers and hide the gear mechanic (or manufacure them from acrylic to show the mechanic)
-- whole for hinges of big dispenser gears
+- hole for hinges of big dispenser gears (only if necessary)
 - shovels for dispensers by cutting segments from a sphere
 
 DONE:
+- center ring for holding the plates
+- make circles for lower plate of the two plates a bit smaller s.t. tube are perfectly set into the upper plate and fixed by the lower plate
 - stack 2 plates for better stability (add cuts at small circles)
 - automate generation of plate segment
 - connectors for segments (jigsaw puzzle style)
diff --git a/prototype/svg_utils.py b/prototype/svg_utils.py
index 43bf64e..18a0dfc 100644
--- a/prototype/svg_utils.py
+++ b/prototype/svg_utils.py
@@ -161,14 +161,7 @@ def svg_arc(p1, p2, r, large_arc, sweep):
 
     return text
 
-
-def svg_rectangle(id, name, c):
-    center = c['center']
-    width = c['length']
-    height = c['width']
-    angle = c['angle_deg']
-    x = np.sqrt(center[0] ** 2 + center[1] ** 2) - width / 2
-    y = - height
+def svg_rect(x, y, width, height, angle=0.0):
     text = ['<g transform="rotate({})">\n '
             '<rect x="{}mm" y="{}mm" width="{}mm" height="{}mm" style="fill:none;stroke-width:0.1mm;stroke:rgb(0,0,0)" />\n '
             '</g>\n'
@@ -176,6 +169,16 @@ def svg_rectangle(id, name, c):
 
     return text
 
+def svg_rect_trans(id, name, c):
+    center = c['center']
+    width = c['length']
+    height = c['width']
+    angle = c['angle_deg']
+    x = np.sqrt(center[0] ** 2 + center[1] ** 2) - width / 2
+    y = - height
+
+    return svg_rect(x, y, width, height, angle)
+
 
 def svg_line(p1, p2, width=1.0):
     text = ['<line x1="{}mm" y1="{}mm" x2="{}mm" y2="{}mm" style="stroke:rgb(0,0,0);stroke-width:{}mm" />'.format(p1[0],