Think that approach might be too much for a simple lever. You could have its rotation look at the mouse when clicked, clamping the levers rotation. Much like how it could be done in VR. For example: https://www.youtube.com/watch?v=o5S4ICq1E7M
And the BP for this is quite simple:
(looking back I see this could be better… it’s just an example 
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Having the mouse interacting with an invisible collision the shape of the lever should work the same way. You can even have an invisible box following the mouse and the lever moving at X speed after that box giving the illusion that the throttle is heavy.
I’ll share later an example with a lever using the mouse.