make sure location grid saves when needed, and doesn't save when not needed
make sure location grid saves when needed, and doesn't save when not needed

Caoimhinmg/PmagPy,lfairchild/PmagPy,lfairchild/PmagPy,Caoimhinmg/PmagPy,Caoimhinmg/PmagPy,lfairchild/PmagPy