Well what I do is first I place down a land mark. Then I apply a redstone signal (lever will do) and that will create blue lazers that shoot out in every direction. Then at the end of two of the lasers place two more land marks like shown in the previous post. The blue lasers will help make sure you line up the marks precisely. Of course right click the first land mark when all are done being placed. This will create a box of red lasers. Place the quarry next to the first land mark you placed and poof you have a 64x64 quarry.