An old school fix would be to wedge a block of wood behind the sustain block. This adds sustain while further preventing the bridge from moving when b...

Definitely sounds like a grounding issue. One or both of the 2 ground wires are not grounded. Since pickup wires can be whatever color the manufacture...

That is a normal neck / headstock joint. some factories make the headstock separate from the rest of the neck and glue them together before putting th...