TinkerENG: First-Hand Look At Rob Haviland’s Ladder Alert Prototype By Design Group | May 15, 2018In this episode of TinkerEng, co-host Peter Ragonetti gets a first-hand look at Rob Haviland’s Ladder Alert prototype. Ragonetti chats with Editorial Director Joyceann Garippa on design, manufacturing and the next steps for this project.