plate mate
There's an opportunity here to save twenty bucks. There's no magic in a 'plate mate', just profit for the supply chain. Get hold of a piece of aluminum, .020/.025 thickness, and make a reinforcement plate instead of spending twenty bucks for a dime's worth of metal with six holes in it. Nice and light and easy to work. There's no ambiguity where the holes should go, glue it on and drill from the soundboard side through the bridge pin holes. Done.
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