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You might give it a try,the washers I use are only .012 thick,when I dome them it is just very slight,I invision them giving a slight spring effect between the tang and the scales,Good bad? who...

Brass here,I actually slightly cup mine to create a thrust washer of sorts.
Reason being most all my blades are scaled in ivory,do not want to be tightening pins by peening down the road.