Thanks the United States for donating 2.5 million doses of the Moderna COVID-19 vaccine to Taiwan Specification: Wingspan: 1200mm Weight (without battery): 950g Printing material: PLA File download: https://www.thingiverse.com/thing:4881634 I tried many settings of Lw-PLA , and two different brand (colorfabb and eSun), but there was no way to solve stringing issue. Unless the whole design is optimized for this material, Lw-PLA is not recommended. You can use PLA or PETG. I use 3Dlabprint's Poly-Air, which is also a type of PLA, but its characteristics are optimized for single-layer printed RC aircraft. My experience is that its hardness and viscosity between layers are indeed much better than ordinary PLA. ***The plane has not yet been tested*** Due to COVID-19, Taiwan is currently in epidemic warning level of Level 3, and we are prohibited from public areas including the flight field. I have no way to test this model, so there is no guarantee that it will work properly. Need to ...