it's a very good heli if nothing warps in the head. Some folks have reported problems with that, but I never had it happen to me.

You probably should leave the paddles til last. Once you have all the electronics in, you can set the swash, mixers, washout and grips to zero- then screw on the paddles and align the flybar frames and paddles to the swash. For full disclosure, I'll tell you that yes, I've flown it without gluing the paddles, but it was because I forgot I hadn't set the flybar up! The right answer is to soak the threads on the flybar with thick CA, then screw on one paddle as far as it makes sense, and align it to the control frames. Screw the other one on with glue the same way, but align that one with the paddle you already lined up, not the frames, then walk away for 12 hours or so to let the glue cure. Then come back and align the control arms and balance the flybar side to side again.

You can leave the glue out, and it will probably be OK but I never would by choice. If one of the paddles shifts in flight, you will have a bad day .