Use this fixture to position your blinds bracket.  A spacer is included to evenly space if you have a large window with multiple binds.  Alternatively there is a hole guide if you prefer to drill a pilot hole.  This was designed for Levolor brand (https://www.lowes.com/pd/LEVOLOR-Trim-Go-Ecru-Room-Darkening-Cordless-Cellular-Shade-Actual-59-5-in-x-72-in/1001460534) but it may work for others. This is really just the concept since it won't work for all blinds and the bracket is easy to make (or modify with included OpenSCAD files).  Enjoy!