Hey thanks for the photos! I have the whole bunch of ones I took on my HDD, but I never had the ones of that chopper assy. opened up like that. Those are VERY cool units. The wildest thing is that given the fact that their blades are angled, and the lightness and low friction of the chopper motors, the blower can blow the chopper around. This can be clearly heard in the Milwaukee recording on YouTube.
My little random fact rant of the day!