This is my design for the FlexBot quadcopter. It features a more rotor-friendly frame that should protect the blades when it gets out of control... This is work in progress. If you want to print it you may need to tweak some of the parameters.I printed the version before this and fine-tuned some of the measures until my printer's bed thermistor got loose, so I'll have to fix this first before I can make this final. Therefore, this is a work-in-progress and your milage may vary...