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If I am inside the scales, it means they are going to be replaced. If I am up for that, I am going to be certain that things are as good as they can be. Bushing a pivot hole takes less than 5...

I find it simpler to use what ever size K&S tubing won't quite fit into the hole and then drill the tang for that tubing. Use the progression of tubing sizes to step down to 1/16" ID for your pin.