Yes use a Stainless washer , I just did this on my brass gear . Basically as described above . For availability in my area I could not get a stainless washer any thinner than .060 . So That is what I had to work with . But I machined the Brass gear to accomodate this thickness . Seems like it was the thickness of the raised area on back of gear plus .040 . works very well . I could only find the picture of the back of gear . Gary