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@@ -104,7 +104,13 @@
 
 			<section>
 				<section>
-					<h1>Factory Tour!</h1>
+					<h3>Factory Tour!</h3>
+					<div>
+						<img src="img/xkcd-tasks.png" alt="It's hard to know when something is easy and when it's hard">
+					</div>
+					<small>
+						<a href="https://xkcd.com/1425/">XKCD 1425</a>
+					</small>
 					<aside class="notes">
 						I find the best way to understand something is to take it appart. This is the world of open source, after all.
 						The nice thing about manufacturing is that you're free to inspect all of the ingredients that go into a product,
@@ -282,7 +288,7 @@
 				</section>
 				<section>
 					<h3>3D Printing</h3>
-					<img src="tomu-3d-prototype.img" alt="3D case prototypes">
+					<img src="img/3d-printed-cases.jpg" alt="3D case prototypes">
 					<!-- <h3>Almost (but not quite) entirely unline injection molding</h3>
 					<ul>
 						<li>STL vs STEP</li>
@@ -314,7 +320,8 @@
 					<h3>Software: FreeCAD</h3>
 					<img data-src="img/freecad-start.png" alt="FreeCAD Example">
 					<aside class="notes">
-						FreeCAD is an excellent piece of software. It's parametric, which means you define the object as a series of
+						ISO 10303-21. FreeCAD is an excellent piece of software. It's parametric, which means you define the object as a
+						series of
 						steps. It's great for ensuring what you create in the virtual world closely matches the real world.
 					</aside>
 				</section>