Just a bit of trivia, do you know that it is actually hard to tell a 6x gain and a 3x gain amp apart? Due to the way our ear hear things, we only register a moderate increase in volume when we double the output power, I know that in principle, but I was just testing a 6x custom order unit out a while back, and before I put it on the scope, I had a listen. I was kinda surprised about how little difference the volume control's setting between the 6x and 3x model. I actually thought I might have set it up wrong, but on a scope, it shows up just fine, with twice as much gain as the 3x model.
This is why I don't offer every integer step of the gain setting between 1 and 11, because it would not really help anyone by having that much gain option when your ear would have a hard time telling apart a 3x amp from a 4x amp.
Anyways, have fun. ;)