i built my 110 many many times and it still is giving me issues so i put it away for a while.
I decided to retune my 210 qav to still get some brushless feel in.
I got about 10 seconds into the 1st battery in my woods spot.
I flew out over the open field of bushes, faced my car and attempted a fast roll to gauge my flip.
Once upside down i lost all power. The quad fell silently with no power into the open bushes.
No buzzer signal no cam signal. We searched 2.5 hrs till dark then went home alone.
A day passed and it lightly rained.... I spent my day at work looking out the rainy window wondering how my quad was....
We went out again yesterday and found it upside down, battery unplugged in a bush.
My xt-60 hard mounted to an armattan pdb was super loose.
So loose that the flip's inertia had actually pulled the connector out mid air.
After researching i found that someone uses toothpicks jammed into the center of the prongs to widen them and keep then wide. I tried and it works great. I cut 2 pointed ends off a tooth pick and lightly tapped them into the center of each prong.
i now have a tight hard mounted xt-60 that i can still unplug, yet flips can not.