hi,

carbon tube are 14/16mm

with 6000mah, i ger 16 minutes flight time .

Thanks. I wish I had gone that thick on booms for greater strength. 16 minutes seems short though. At least less than I would have expected. I wonder if its the all up weight, or the batteries are misrepresented... Only thing I can see, is I am using 10x4.5 apc props. They are nice and rigid. Maybe they are more efficient, or maybe because I am a hex there is less draw for thrust... Definitely cheap enough you should give them a try and see if you can't squeeze a couple more minutes out of it.