Recently got a BSIAB2 in trade. It doesn't "get going" until both volume & gain are cranked about 3/4 over, and has a digital "fizz" to the decaying sound. It also dies off rapidly with little sustain. Is this normal for this pedal? I like it's overall sound, very cranked-Marshall, but the lack of sustain and having no volume or gain until either pot is past 1/2way bothers me. Looked inside and saw there's a combination of 2n5457s & J201s, would it be worth it to swap them all out? I've read they can sometimes be bad but don't know the symptoms. Just getting into building pedals but not too keen on diagnosing trannys yet. All wiring seems to be in order, and adjusting the trimpot yields no improvement. Or should I just send it off to Chad at CMATMODS for repair? Any advice/thoughts is appreciated.