I recently ran some Sandvik anti-vibe bars in a high-temp alloy and they work. Much better than the same sized carbide bar. Yes, they are expensive, but they reduce/eliminate chatter when the L/D ratio increases. I suggest you call your local Sandvik distributor and have them bring in the Sandvik rep. to look at the application and make some recommendations. If you don't like Sandvik, try KM.