It looks like your tail rotor is really taking a beating there... I don't know if you couldn't see that in the video? I mean I don't know the first thing about aviation. Just that I would bring it up.😮
If you're gonna go to all that trouble to drop the tank, might as well replace the pump and not just the sock. A new Denso pump is not expensive at all.
Can't quite imagine flying something in a permanent state of autorotation... I'll have a normal helicopter thanks.. but there is no better feeling than being up there on a nice day with the doors off 😎😎