From the article: "... I found a great way to add it that will work for many laser cutter setups.<p>I didn’t design any of these modifications, but I did alter them to fit my particular circumstances. You can find my very simple modifications to other designs on Thingiverse."<p><a href="https://www.thingiverse.com/thing:4770120" rel="nofollow">https://www.thingiverse.com/thing:4770120</a>