Throw it away - preferably into the fire, otherwise some child may find it and try to use it. I had it and couldn't turn with it. The problem is that it had very narrow range of deflection and therefore is very sensitive to fluctuations. The small deflection range is good for "twitch" games, but terrible for flight sims where you need precision, not speed. Good scaling advances you from "unplayable" to "just plain bad".
When you buy a stick for flight sim, wiggle it a little and make sure it has a large deflection range. My ancient CH-flightstick was the best in this respect. Then I had the Logitech for a short time, threw it away in disgust and got an old Microsoft FF2. The difference was worlds apart.
I can't agree more on this one, I had my logitech 3d pro for 8 months, 8 months of pain, everyday recalibrating both win and in game, scaling, raising and decreasing damp, dead zones etc... I could only get kills in deflection shots or sometimes in straight shots
using the trim for "little" corrections. Before that logicrap I used the MS sidewinder precision pro, it is still impressive and accurate but I dont use it anymore due to the analogic port (new computer doesnt have it). So I just bought a new full CH set, a whole different story compared to the Logi 3dpro.