Kool, you've been a great help so far I'm going to try and build a circuit over the summer that will be able to *hopefully* switch the pickup attatched to the sustainer from middle to bridge when the sustainer is on, so if you have an hss layout you can get the sustainer sound on different types of pickup (if that's in any way possible ) and I have a *possible* solution to the 'pop' problem, don't know if that's what you just described. It could be possible to add a killswitch into the switch that turns the sustainer off that briefly cuts the connection from the jack as the switch is flicked then reconnects when it it fully turned off. Would this work? If not the other solution is having a killswitch on the guitar and using it when you're going to turn the sustainer off? xD Ignore me if that's nonsense, I don't rly know what I'm talking about, I just want to take part and maybe learn something eventually