Just browse zone and image to see what each of the Rubble, Rock and Mountain will give you has free space.
Hopefully this can be usefull for some players find the best placements to use those costly rock buffs!
http://s1382.photobucket.com/user/ne...ne - Shotfirer
Just browse image one by one and go back to see change and given free space.
Use the arrows on each side of the image to go forward or back
I try different ways to make it look nice but this way it is less messy and you see one by one after each rubble or rock or mountain that get removed what it give you has free space.
chronological order
Zone 3
Zone 6
Zone 7
Zone 9