Are all the parts on top of the wiper motors metal, the channel that the Oscillator slides in as well as the vertical plate the side of the same slides against, when turning to the off position about half way, the oscillator tweeks toward the front of car and is getting pinched so it wont go to the off position unless you guide it straight with your finger can these two pieces be bent toward the firewall to keep the travel straight or are these pieces cast and could break. Thank, Brad.



