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diff --git a/tikz/figs/system_dvf.pdf b/tikz/figs/system_dvf.pdf
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diff --git a/tikz/figs/system_force_sensors.pdf b/tikz/figs/system_force_sensors.pdf
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diff --git a/tikz/figs/system_iff.pdf b/tikz/figs/system_iff.pdf
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diff --git a/tikz/figs/system_parallel_springs.pdf b/tikz/figs/system_parallel_springs.pdf
index 3d75b61..58e3e7a 100644
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diff --git a/tikz/figs/system_parallel_springs.png b/tikz/figs/system_parallel_springs.png
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diff --git a/tikz/figs/system_parallel_springs.svg b/tikz/figs/system_parallel_springs.svg
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diff --git a/tikz/index.org b/tikz/index.org
index e4e7072..9cda532 100644
--- a/tikz/index.org
+++ b/tikz/index.org
@@ -83,7 +83,6 @@ Configuration file is accessible [[file:config.org][here]].
     \draw[dashed] (0, 0) -- ++(2, 0);
     \draw[] (1.5, 0) arc (0:\thetau:1.5) node[midway, right]{$\theta$};
     \node[] at (0,0) {$\bullet$};
-    \node[left] at (0,0) {$(x, y)$};
 
     \draw[->] (3.5, 0) arc (0:40:3.5) node[midway, left]{$\Omega$};
   \end{tikzpicture}
@@ -151,7 +150,6 @@ Configuration file is accessible [[file:config.org][here]].
     \draw[dashed] (0, 0) -- ++(2, 0);
     \draw[] (1.5, 0) arc (0:\thetau:1.5) node[midway, right]{$\theta$};
     \node[] at (0,0) {$\bullet$};
-    \node[left] at (0,0) {$(x, y)$};
 
     \draw[->] (3.5, 0) arc (0:40:3.5) node[midway, left]{$\Omega$};
   \end{tikzpicture}
@@ -230,7 +228,6 @@ Configuration file is accessible [[file:config.org][here]].
     \draw[dashed] (0, 0) -- ++(2, 0);
     \draw[] (1.5, 0) arc (0:\thetau:1.5) node[midway, right]{$\theta$};
     \node[] at (0,0) {$\bullet$};
-    \node[left] at (0,0) {$(x, y)$};
 
     \draw[->] (3.5, 0) arc (0:40:3.5) node[midway, left]{$\Omega$};
   \end{tikzpicture}
@@ -313,7 +310,6 @@ Configuration file is accessible [[file:config.org][here]].
     \draw[dashed] (0, 0) -- ++(2, 0);
     \draw[] (1.5, 0) arc (0:\thetau:1.5) node[midway, right]{$\theta$};
     \node[] at (0,0) {$\bullet$};
-    \node[left] at (0,0) {$(x, y)$};
 
     \draw[->] (3.5, 0) arc (0:40:3.5) node[midway, left]{$\Omega$};
   \end{tikzpicture}
@@ -383,7 +379,6 @@ Configuration file is accessible [[file:config.org][here]].
     \draw[dashed] (0, 0) -- ++(2, 0);
     \draw[] (1.5, 0) arc (0:\thetau:1.5) node[midway, right]{$\theta$};
     \node[] at (0,0) {$\bullet$};
-    \node[left] at (0,0) {$(x, y)$};
 
     \draw[->] (3.5, 0) arc (0:40:3.5) node[midway, left]{$\Omega$};
   \end{tikzpicture}