I've finished rewiring my bass and grounded everything (I think). There's wires from the bridge which I connected to the other grounds and then grounded the lot to the plug on the jack. I didn't connect this ground to the output lug however (as had been done before). I'm using a pair of VOX amPhones and have no problems however when I plug my laptop into the headphones alongside my bass when I touch the strings I get a lot of noise (fuzzy hiss) through the phones. Is this related to grounding? This does not happen when my ipod is plugged in, only when the laptop is. Not sure if its related to the laptop creating some sort of circuit or if its poor grounding in my circuitry. Something else I've just noticed is that when the tone pot is open (i.e. no cap) there is a really faint hiss, when it is closed there is no noise at all.