I think you did the right thing. My instruments aren't nearly as loud and I still make sure I only practice at a resonable hour. With my steel drums since i know they can be fairly loud, not enough to make a window rattle but loud enough to where I'm sure people will hear it, I only practice during late afternoon hours when people are more likely to be out of their home and even for a late sleeper it not too early that I am waking them up. With my bassoon I will sometimes practice as late as 9, but usually I try not to practice that late. People need to learn how to respect their neighbors and even as a musician I realize that not everyone wants to hear my music.