Thomann Nataraj Tanpura Bridge Female

I ordered 3 of these to convert a 12 string koto into 3 differently tuned tanpuras...great in theory and with decent quality bridges it will be a reality. Of the bridges I received: 2 were broken with the legs snapped off. All 3 are unusable because the bone parts are not flat. I'd say you would have to try hard to make them this badly, they need to be completely sanded back flat and polished again. Ridiculous really. I can't be bothered to return them, I will try and bring the top surfaces flat and polish them and hopefully get some accuracy.