You might think about getting a square-up ruler instead of separate single rulers. The proper way to use this ruler and the ruler itself is on Quilt in a Day website. Eleanor Burns has several rulers that can be used for more than one thing. I believe that Walmart has several rulers along this line also. Most patterns suggest which rulers to use, you just have to learn how to adjust what you have to limit the number of rulers you need. Have a good trip to the States and keep in touch with us here.
Charlie