There is another possibility, instead of the metal washers. How about nylon washers for spacers? Micro Fasteners has small #0 nylon washers. I use them as spacers and the work well. Any thoughts on this?
They work great... until they break and tear... by opening an closing the razor there's friction at the pivot pin. Eventually they will tear or become loose. I've had it happen on a few razors I did when I used them. I've since stopped using them long time ago.