It's funny how one blade works for some and not others. For me, FD UR blades just don't work for compound cutting, but Polar blades do. Regardless of blade type, it is still slow going cutting thick wood. You cant force the cut, you have to let the blade do the cutting. Blades don't last very long either. Depending on hardness of the wood being cut, I can get three to five bird houses per blade