Magnetic PCB Holder
thingiverse
a 3D print ready version of A Small Magnetic PCB Holderhttp://blog.tindie.com/2016/09/pcb-holder/ You will need 20mm magnetshttp://www.banggood.com/4pcs-N52-205mm-Counterbore-Hole-5mm-Neodymium-Super-Strong-Magnets-p-941810.html
Download Model from thingiverse
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