I have my Trimmer force set to 50, Shake set to 40, and swap axis box checked. This is for both pitch and roll axis.
The way you fly has to be more like real life if you want to take advantage of the FFB2 stick. I created a UH-1H replica cyclic grip for my MS Sidewinder for this reason.
For take off/landing and hovering you toggle the Force Trim switch on the fwd centre console to 'OFF', this will release the mag brake and make the stick feel very weak and easy to use. This makes take off, landing and hovering very easy.
Once you transition to fwd flight and are stable, select the Force trim switch to 'ON' while also depressing the force trim button on the cyclic. While holding the cyclic in the desired position release the force trim button and it should hold the cyclic in position.
To trim during flight press the force trim button then re-position the cyclic then release the button.
Note: The Huey will still require minor inputs to fly strait and level, this is not an auto pilot haha.
You can find my MS SWFFB2 here.
https://forums.eagle.ru/showthread.php?t=186142