My Smart grinder has started to get very loud when grinding. A few roasts ago I under-roasted some beans and when the grinder was grinding them it seemed to be struggling, taking a long time. Lately, with well roasted beans it sounds like a clutch is slipping with a ratatatat. I called Breville service to ask if I could get some replacement burrs, but the service tech said they did not have replacement burrs. That surprised me because I have read threads about the new version that said the burrs failed several times and Breville sent replacements. I wonder if some dealer stocked the replacement burrs for the original version and still has some.