When you hold down the keys mapped to "RPM Increase" and "RPM Decrease" the rpm smoothly moves up or down.
However the keys mapped to "Throttle up" and "Throttle down" only cause a small movement in the throttle position. You have to press the key, then release it, then press it again, and repeat this to make the throttle position change.
If we can't have this, then allow the "Throttle min/max" key bindings to work at the same time as an analog throttle.
I couldn't decide if this should go in the wishlist or the bugs section.