The best 3 inch frame I have flown so far, it flies like a 5 inch Quad. It's small and fast, so I added a NamelessRC Tiny GPS Modul and a mini buzzer to help you find it. 3D printed parts are all printed very thin with a wall thickness of 0.7 - 1 mm. Flight time with 4s / 550mAh about 5-6 minutes, depending on how you fly.