Z3D is an aspiring product development team from Taipei, Taiwan, centered around 3D printing filaments. We are all passionate about 3D printing but have experienced annoying issues such as stringing, layer shifting, and weak infills. We hope to develop better and stronger filaments for this inspiring community. What issues do you face the most? In addition, please fill out this survey http://goo.gl/forms/nVGV0BGxtMtwF4zG2 regarding your experiences with different filaments. Thank you so much!