The early models of Inspire were build with mesh type carbon fiber tubes, if I'm not mistaken. Late models, however, employs so called camo tubes, nicknamed for random fiber pattern: Accordingly to Clearwater Composites, leading US manufacturer of carbon fiber profiles, "...the two tubes in question are made with completely different manufacturing processes: "camo" being filament wound (one continuous filament wrapped onto a mandrel), while mesh pattern is roll-wrapped (each layer of carbon fiber laid up in specific orientation). Roll-wrapped tubes are typically stronger, stiffer, and more consistent than filament wound tubes..." Judging by documented crash landing reports, tubes are rarely surviving in one piece. Extremely difficult to repair or replace ... What was the reason to make such change, other than cheating and corner-cutting? I'm far from such accusations ... From engineering point of view there may be one only I can think of, but I'll remain silent for now. Perhaps somebody close to DJI engineers know more than I do?