I sent my BBK back because it did this non stop ,,i also had a problem with my xmetal single blade doing this ,,,the xmetal one was dragging ,,had to remove and file down one side of blade just a hair ,,
pull your TB off,, clean it real good ,,and hold it up to the light and see if you see any drag marks right were the shaft and blades meet up ,carbon will build up there and if it is like mine was youll see a few tiny drag marks there ,,i took some 1000 grit and had to pull the single blade out and clean it once since taliban dan fixed mine up ..
i had to put my xmetal one back in cause the BBk did this all the time ,,,since it was new and under warrenty they had me return it :dontknow: funny part was it only did it after driving for an hour or so ,,when cold it did not do it ,,i think when the metal got hot it expanded making it tight and start to drag and stick ,,so the comment on it HAS to be a duel blade is false :itsme: