Everything I did for the bonsai garden was using just rough measurements , mail box stakes are very easy to work with and if it's off you can use a pry bar to pry it back up and restart. Get your self a short leveler and start out by pushing the stakes down with your hands first and start leveling vertical sides and use a sledge hammer the when the stakes are about half way down. The 3 stakes that was used for the bench was somewhat aligned but and once the woods was on you can't even tell. Its very easy to work, trust me ..if I can do it ANYONE can do it. That juniper is awesome.