I'm a little closer to finding the correct tile to erase once it's hit by the laser. Since my math and programming skills need developing I cannot figure out how to find the correct offset to find the tile.
The last event is as far as I have got, the (temp) object is just a placeholder to view which position is returned.
Hope that all makes sense I've had a little too many coffees :)
dropbox.com/s/2hnahs2i0sssnpc/erasetiles2.capx