I'm doing a thesis on designing a new stem so I NEED YOU! I've made a REALLY short survey (only 9 questions long.) just asking about anything you may have had gone wrong with a stem you have owned. Even if your stem has never failed there are no answers as well (Which do still help). If you's could, it would be great for you to fill it out as every bit of info will help. Once i have all your answers ill be sure to upload lots of pictures of the fabrication of it and who knows i might sell you one in a few months time!
Here's the link;
Also, if you want you can send me pictures of your broken stems with a description of how you did it. All info is very helpful!