Here is my grid that has 519 targets.  :tellme:

Its made for a Siamese pair of monitors with a 3360x1050 rez, so the center targets are sparse.

There is a top 'docker' target bar, and below it an 'undo' or undock bar.


When you load this grid, be patient -- give it like 2 minutes or more before it will compute the first time. But once it does, you can put windows on the following:
1 1
1 2
1 4
2 2
2 4
4 2
4 4
1 6
2 6
3 6
4 6
1 8
2 8
3 8
4 8

3 2
3 4