I reckon you're measuring the wrong dimension.
The length of the arm is what affects lever throw.
If you were to extend the lines through the rod and arm in your sketch to make a right angle, you would see that the effective length of the arm has now increased. Bending the rod doesn't do this..... well maybe very marginally, but not adding the extra length in your sketch.
I hope I'm wrong and your device works, but it looks wrong to me.
If you don't bend the rod it just rubs on the frame and you can still adjust it.
The length of the arm is what affects lever throw.
If you were to extend the lines through the rod and arm in your sketch to make a right angle, you would see that the effective length of the arm has now increased. Bending the rod doesn't do this..... well maybe very marginally, but not adding the extra length in your sketch.
I hope I'm wrong and your device works, but it looks wrong to me.
If you don't bend the rod it just rubs on the frame and you can still adjust it.