F-lever
The F-lever is versatile in the sense that is is easily adjustable to make it fit most needs. I chose this as opposed to making a lever from raw material (because that way I could get it exactly as needed). And this works out perfectly. Due to rotating on bearings it is smooth and quiet. Its adjustments offer enough possibilities to make it fit both the horn and the hand without much difficulty. It is manufactured with care and looks nice&clean.