I have a question for those that have the E-Power and the 510 extension. I just got the new Turbine with the extension so I could use it with my E-Power. What I have found is that the extension does not fit well on the E-Power. It fits everything else though. At first, I thought it had the wrong threads because it wouldn't catch at all. So I tried it on another 510 PV, and it worked well, nice and snug. So I tried again with the E-Power, and found if I press down on it, it will catch, but only barely. It isn't very secure as if I tap it the top, it will fall off.