No, nothing like that. All my balls (the ones in the heli kit) have a either a hex socket right in the top of the ball or it a ball that is meant to be used with a socket head cap screw going through it.
The tail box was fine. I do see some very small cracks on one side of the canoopy which are very hard to see.
The front transmission gear mesh was too tight but a little pressure pushing the horizontal pinion toward the rear fixed that.
Be careful with the loctite on the small shouldered screws that hold the dog bones between the pitch slider and the tail grips. It is very easy to have those get bound up on the shouldered screws.