I recently ordered 2 sets of Buttercut Ceramic blades, (4, 5,7, 10, and 30 blades), and I'm sorely disappointed in how fast they get. I love how well they cut, but after 2 or 3 minutes they are pretty hot, (I use them on my Heiniger Opal), meanwhile I can use my Andis Ceramic-edge blades for 6...