nasonm ,I didn't see any of what you mentioned on the Vaporizers coverings here in Milwaukee ,WI but there may be a few due to bad manufacturing control idjester I just use the tone dial (witch I love ,so easy to dial in a great sound) to control any harshness in tone . At lower volumes with single coil pickups I think for my ears the normal channel is best. My Gretsch with those filtrons (mini humbuckers)sounds best in the bright channel. I see this amp as being good small club amp where a louder amp like my 40 watt Fender Deluxe VM has to be turned down so low that it begins to sound lifeless and dull where the Vaporizer sounds more like you can push it and yet still not offend people in the bar and avoid the dreaded TURN IT DOWN! I think it is a very nice tool for that purpose!