Is there any easy way to open/close bay window blinds at the same time?
We have the exact same situation (bay window with 5 panes and 5 independent blinds) and I have toyed with the idea of mechanically ganging them all together.

The point where the twisting rod enters turns a cam which is coupled to a pulley system to tilt the slats.   I posit that an appropriate line wrapped around each "twister" could do all of them at once.

I have not attempted it though&mdash;not even had a look inside.  The set of blinds cost over $800 and my wife is quite reluctant for me to perform experiments which could affect the appearance or function.  And she doesn't mind one bit if it takes me 30+ extra seconds per day twisting each individually.