Forrest recommends that you use a stiffener with all saw blades. I tried it with one of their thin kerf Woodworker II blades, then with an 1/8" kerf Guhdo-GMAXX blade similar to the Infinity blade you mentioned and there is a noticeable improvement in the cuts. For many years I have only used Freud red blades on all my saws; it is hard to beat the value with them. The only saw blade I have been disappointed in was the Porter Cable Laser with progressive teeth.
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