+1. Please implement this variable brightness feature request.
Mod Duo can sit on either the floor (typical for guitarists) or on a desk (typical for keyboardists). This requires the team to rethink the use cases for these users.
Please include a variable brightness control for those of us using modduo on a desktop. The current default brightness is simply too bright.
To go one step further— if the team ever offered an inverted LED display upgrade (black background / white lettering), I would purchase immediately.