Thanks so much for reaching out and thank you for the tips! Placement looks great and that rosewood back is lovely.
If you're having trouble with that lingering buzz, try flipping the phase switch that's located inside your guitar on the edge of the circuit board that the knobs are mounted on.
That should help!
Both Overdrive and Autowah are our highest gain effects and can certainly be prone to feedback. There are a couple ways to deal with it on these two specific effects. First, you can click the amplitude on the right. Click to toggle between effect volume and effect gain. Reduce the gain down from 25 to about 12-15. You'll want it as high as possible without experiencing feedback.
The other way to deal with those two effects is to reduce the volume on the guitar a bit while using them.
Regarding the bypass screaming at ya as well, there are two ways to kill that sound, too. First, you can reduce the gain and volume down to 0-5 using the amplitude knob. You can then save the setting. Otherwise, you can run an update found at http://twamp.tips/files/ to either reset the TWA to factory settings or to replace overdrive with chorus. The update will silence the bypass setting!
Right now, yes. Though we are looking into making the effects more user specific.