I bought a new impeller upgrade from MV from a fellow member and have a quick question. I am always cautious when I don't have a manual to go by and the fact that these impellers are aluminum compels me to be cautious. The impeller is obviously threaded on but is it a right or left thread? Do I use a wood dowel to tap it off and then just hand tighten as far as possible using some thread locker or do I tap it on with the wood dowel. Any help from this very knowledgable group is appreciated.