I am not sure about your comment about the spiral blade on thin cuts. If you mean using it instead of the flat or using the spiral after the cut. I am not sure how much spiral you have cut but most people have a lot of problem using the spiral as the primary blade. It takes some practice to get the feel of the spiral but well worth the effort to learn, especially if you get into patterns with a lot of really small holes, then the spiral often with save you from breaking of some pieces that the flat blades often can do in a tight turn. One thing some people do on really narrow cuts where the straight blade doesn't allow the opening to be seen very well on a finished project, is to make the cut with the narrow opening with the straight blade, followed by using a spiral down the same cut to widen it. The spiral will want to follow the previous cut and widen it so it can be seen easier.
That said, you will find the Pagas blades to be sharper than most other blades and may seem a little too aggressive at first. After you get used to them and learn the feel and ease of how they cut, you may really enjoy them.
Dick
heppnerguy