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The Prime’s arm has two further features of note. The first is that while a conventional arm has an effective length of nine inches, the Prime uses that interesting Plinth to extend the armboard length away from the platter and means that it has an effective length of ten inches. The thinking goes that with extra length comes a reduction in distortion from the action of the pivot. This has to be balanced against the increased length adding mass and other issues to the performance but VPI has thought about this too. The Prime’s arm therefore is a 3D printed affair that takes the length and resonances into account in the design- while also costing less than a equivalent metal one.