A good result is always achieved with the Stampin’ Up! Two-Step Stampin’ sets when you use the Stamp-a-ma-jig (SAMJ) to get the desired alignment of the two images. There are lots of tutorials on the Web showing how to use this great tool correctly, so I won’t go into the details here.
The tip I have for you, is to create a set of templates for your Two-Step stamp sets and store these in the box with the stamps. That way you can quickly whip out the images you want knowing that you can get the correct alignment really quickly.
I create the templates using sheets of acetate that you can buy from OfficeWorks or similar stationery stores. I cut the sheet into sizes that allow you to stamp an image into each of the corners without overlapping (and that fit into the stamp container). Line up one corner of the acetate into the corner of the SAMJ. Ink up the stamp with a permanent ink such as StazOn and making sure the Stampin’ Up! Copyright line is at the bottom of the stamp, stamp the image. When you go to re-use the template, just check that you are holding the stamp in the same way when you line it up.
The image below shows the Rose Is a Rose set divided into a set of 4 images.