Hi folks, I am looking at a used (Great Shape) MIJ Fender Jaguar Bass. It is Active / Passive, and I read about the need to work on the shielding to prevent hum in active mode. Is there anything else I should look for / look at / inspect? I am heading back to the store after work to play it, and if possible pop the controls to see if it has been changed / messed with. Thanks! any and all advice is appreciated..... I will also need to figure a case or gig bag for it, too.