Took a little closer look at things today.
I'm no rocket scientist, but ....
This looks like the main cause of the lack of distance when I
was trying to throw that small volume of snow.
The space is just a little to wide.
Don't you think...
That's a short 3/8" drive extension.
The gap has got to be 1/2"+
This is the worst of the three paddles. But the other two aren't much better.
With that large of a gap the snow was simply piling up in the housing.
Until the volume was great enough to be limply thrown out.
You can kind or see that happening in the video.