I had to superheat my drill bit with a small propane torch in order to not chip the resin while drilling it. But once the hole was placed, I got the 5mm LED in therree just fine and ran the electrodes out his back Aand into the fabricated battery pack. Once all the wires were ran I taped over them, painted and then uncovered once it was all painted and got them soldered together. There's a removable endcap that closes the circuit out, so I can turn it off when it's not on the table.