Why would you run a chip at dead slow- For start up of the flywheel/disc yes but then crank the eng. up to wide open. Bear Cat/Echo are very good units and not over hyped. I have a 20hp chipper shredder of their's which I find to be a very good unit. I have a mtd piece of junk as well still trying to get rid of it also an extremely old Kemp which in in its old age works better than the MTD junk.