I currently have some problems with my helicopter, my Freya, it is really my tail that i have some problems with.
When i do a fast backwards flight or with the tail on an angle into the flight direction, the tail is oscillating a bit, and that is not a good thing when i have a competition in a week.
I have found some slop in my tail link and i think it must be the slop that is course the oscillation, here you can see a video of the slop.
I fixed it with a lot of locktit, the green one, i hope i works time will tell.
The video was inspirit by Mat from Canada, check out his video here very cool right :)