I have a separate grid on each screen. Each with different grid sizes. I have a 3x3 grid on my main display a 2x2 grid on my display to the left and leave my laptop display with no grid constantly locked to my works video conference application.
It works well for me, but as you can see from the comments everyone is different :)
Part of the reason I wanted to to make the app is because _I actually do like fullscreen apps_. Or at least maybe I learned to after they took away the grid. In any case I certainly wanted this app to work with them.
You are correct this was actually and error in my re-collection. I remembered when writing that it was missing something but mistakenly thought it was the EZ. In fact the model number on the case was "PIC7KS" without the 6. Good spot.
You have no idea how true this is :). I had to upgrade everything, the old site didn't even have SSL. But this annoyed me so much I wanted others to know how to fix it.
It works well for me, but as you can see from the comments everyone is different :)