If you have too much troubles with instances to communicate, you will may like to use a box grid added on square grid and use it instead of the mesh. (What i was trying to do at first step but i finally added box and square in a single blueprint.)
If you have too much troubles with instances to communicate, you will may like to use a box grid added on square grid and use it instead of the mesh. (What i was trying to do at first step but i finally added box and square in a single blueprint.)