I seem to recall the A and B arms are actually identical. In fact I believe the motors may also be the same. The difference in rotation being the position where it is connected to the ESC and the A/B quick attachment for the props.
I have been 3D printing and designing for about 10 years now. The strength of the filaments depends on which one you use. As far as the weight, some filaments are lighter than the original parts and much stronger. Drone manufacturing is performed on assembly lines and they use the cheapest plastic parts possible without affecting the design or integrity. I can print with carbon fiber, so it holds up pretty well for drones. PETG is a good choice also. I built the DJI Inspire clone from this website and it is still in the air.Dead way to get success. STL files are not design files. Design is drawn. The 3D scanner is good for one more Ken or Barbie toy. Engineering design is a bit more complicated. More than that, 3D prints are weight and not strong enough.
You would be correct. I used spare parts from several I purchased from people who had crashed them to build a couple of extras. The arms are identical. The motors are identical. The ESC controls the direction.I seem to recall the A and B arms are actually identical. In fact I believe the motors may also be the same. The difference in rotation being the position where it is connected to the ESC and the A/B quick attachment for the props.
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