Bummer. In hindsight some sort of filler in the PUP cavities for the veneer to sit on top of may have done the trick. Not too late to either make or purchase timber PUP rings to suit. Real Parts has Rosewood ones... http://www.realparts.com.au/hardware...-rosewood.html
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Not cheap at $42 per set plus minimum $7.90 postage. Also come in blond maple too.