Welcome to the craze! I'm surprised you were able to manage 5.5oz using 9g servos, all 6mm foam and a 3S 850. That's the same weight as my F-22 using 3mm, 5g servos and a 3S 450 pack.
I would like to see some pics of your build.
And don't worry too much about the wind. It will fly in up to 20kph winds. I had mine out again this morning and was hovering in the wind. Lots of fun!
I'll just chalk it up to old age.