How to make a functional plane's gas lever?

Ok so, the blueprint is too big to enter on a only picture, but, in order to do the lever to work i followed this video, and it worked 100%

Update: I already made a way to convert the lever location to the % of fuel i’m injecting to the engine, the problem is, i only can do it on a static point, if i move the object in the world, the % move with it. And i always want to be from 0 to 100%
here’s the pic of how i did the %

Any clue how can i make the % only get affected with the place the lever is between the Cut position and Rich Mixture position?