When people do neck resets on acoustics, they pull a fret at the neck joint, and after measurung carefully, drill a smell hole into the neck joint through the fret slot. Then, using a special setup with a hose and needle, they put steam through the hole into the neck joint to loosen the glue. Look on the OLF for a tutorial, I think there's some there. And check Stew Mac for the equipment. I've seen people rig up a pressure cooker for the steam, or an espresso maker, but I caution you. Steam can build up VERY high pressures, and you must have a relief of some sort, so you don't blow yourself up. Don't see why that wouldn't work for an electric too.