Amelia Meyer's compact alternative to the
jib halyard magic box
updated: 27 April 2022

From: Amelia Meyer []
Sent: Saturday, September 28, 2019 4:36 PM
Subject: Wayfarer "Magic Box" Replacement




My dad and I were at Clark Lake this past weekend, in W2413. You and I discussed that I should send you a link to my project, a screw-based replacement for the jib halyard tensioning systems sometimes called magic boxes.


Please find here a blog post I just published on the subject:


In addition, all of the design files, as well as 2D prints and assembly instructions, can be found here:  


Feel free to post these links on your website, and/or send them to people you think might be interested in them. All of the designs are open-source, and derivatives are fine so long as there is an attribution to me mentioned in the new designs. I would prefer to collect questions or comments on the Thingiverse site linked above; easier to manage in one spot. However, I can take those at this email address if needed.


Happy sailing!



Amelia G. Meyer
"Both optimists and pessimists contribute to our society. The optimist invents the airplane and the pessimist the parachute."--Gil Stern