I have built an MXR Distortion Plus Clone a while ago and got it working. I have breadboarded it first before putting it in a case. Now, I noticed that turning up the volume and gain pots increases its volume but the distortion doesn't seem to reach that crunch that I have heard when it was still on a breadboard. It doesn't even sustain now. Another thing I noticed, when it was on breadboard and I don't play the guitar, there's a very audible buzz. Now, there's no noise, but I miss that distortion I had before.