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The scales are held on by a set of "Pins". You can compare it to rivets if you like, not exactly the same thing but similar.

If you're going to pay for a set of scales maybe you want to ask...

sure, have Bill, or Vladsch, or Joe make you a set of scales and replace the ones you got. If you're a do it yourselfer Vladsch has some premade kits he'll sell.