Ok, note where the pencil is. This is where the stock lever "cuts" into the cover- my cover is damaged from it pretty good - not good
My lever hits further underneath, perfect with the radius of the cover, where it will not cause damage.
Other than pivoting the spring retainer, which would reduce the amount of pull-back, simply "adding a radius" to the arm will not work.... It's going to keep pulling back until it hits, because of the spring pressure.
I like this as it is for my bike
It clears happily here by the foot peg
Details on the stock lever damage versus mine