I have always been frustrated with letter cutters, especially the Tappits! I never can get them to come out nicely. My favorite letters are done with the Martha Stewart silicone mold. I use them all the time. Just push in the fondant, put in freezer for a few minutes, and they pop out perfect. They used to sell them at Michaels, but I think they discontinued them. They still have them on Amazon. http://www.amazon.com/Martha-Stewart-Crafts-Silicon-Alphabet/dp/B007IQWT6W/ref=sr_1_1?ie=UTF8&qid=1421109106&sr=8-1&keywords=Martha+Stewart+silicone+letter+mold
Here is a picture of what they look like.
Toni, Pennsylvania, https://www.facebook.com/WhiteCraftyCakes