This episode kicks off with Stefan sharing his recent trip to Cologne, aimed at discovering new products for his online store. They briefly discuss Tom's video on threaded inserts, including testing methodologies and Stefan shares his story about tackling a TikTok impostor. A significant portion of the episode features an in-depth discussion with engineers from E3D, shedding light on extruder testing, product development, and the nuances of testing methodologies. They discuss the challenges and strategies in developing new products, focusing on extruder efficiency, the impact of design choices on performance, and the balance between speed, quality, and reliability.