Added tension spring to lower inertia.
Due to this there is less shaking in "rig", but proper anchor will be needed.
This is probably 2mm spring, which does job of returning chassis to center (with lever detached of course).
Engine limit was met when I added 4mm thickness spring. When lever made a stop in a half way it couldn't handle spring force
and move further. I wonder how things will go when I'll add more weight, but this axis should not be affected as much as pitch.
Waiting for OSW to arrive to place it and be able to work on engine department and all hardware placing.