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+++ b/topics/04_mechanical/index.md
@@ -36,7 +36,7 @@ Non-contact Mode: Oscillates above the adsorbed fluid layer on the surface durin
 <p><a href="https://www.sciencedirect.com/science/article/pii/S0304399118301797">Tip wear and tip breakage in high-speed atomic force microscopes</a></p>
 
 
-# Digitizer
+# Digitizer Pens
 
 <a href="https://www.marposs.com/eng/application/technologies-touch-probes#:~:text=The%20working%20principle%20is%20quite,called%20the%20probe%20pre%2Dtravel.">Touch Probes</a>
 
@@ -51,19 +51,28 @@ https://youtube.com/embed/vJdcbhGa7Jk
 <ul> <li>CNC Machine -&gt; Workspace alignment/present setting / workpiece measurement, digitizing or inspection</li> </ul>
 <iframe src="https://youtube.com/embed/IcVv1So1n_8" frameborder="0" allowfullscreen=""></iframe>
 
+### DIY
+
+DIY Projects
+
+<p><a href="http://blog.dzl.dk/2018/08/21/3d-digitizer/">Digitizer</a></p>
+<p><a href="https://www.instructables.com/CNC-Manual-Touch-Probe/">Touch Probe</a></p>
+<p><a href="http://www.homemetalshopclub.org/news/12/presentation_1202.pdf">Building a Digitizing Probe</a></p>
+
+
+
+
+# Digitizer Arms
+
 Passive Robot arm
 
+# Digital Templating
+
+# Survey Prisms
+
 Optical Optically tracked touch probes
 <a href="https://www.gom.com/nl/metrology-systems/gom-taster.html">GOM</a>
 
 <img src="images/gom_touch_probe.jpg" alt="GOM touch probe">
 
 <div class="youtube-embed-wrapper"> <iframe src="https://youtube.com/embed/wt4PLgbwxQI?t=92" frameborder="0" allowfullscreen=""></iframe> </div>
-
-# DIY
-
-DIY Projects
-
-<p><a href="http://blog.dzl.dk/2018/08/21/3d-digitizer/">Digitizer</a></p>
-<p><a href="https://www.instructables.com/CNC-Manual-Touch-Probe/">Touch Probe</a></p>
-<p><a href="http://www.homemetalshopclub.org/news/12/presentation_1202.pdf">Building a Digitizing Probe</a></p>