today i had an idea. the wiper arms of my car are not so close to the body, as i wanted them to be. so i spend some time, fiddeling with file and wrench. i tried to make the hole somewhat deeper and with an angel, to set the wiper arm closer to the car and more hiding behind the hood.
after the intial filing, i pushed the wiper omto its shaft and in the right position, and moved the arm to grind it in.
the drivers arm is now about 4mm, and the other is 5mm closer to the car. sounds not mutch, but looks good for me.