Well it wasn't 3k and 8hdt for a improvement no one was looking for is called FREE...
That's called an added benefit the other options surely can't give you, and then there is also the test of splitting 1st also, could make another drop.. again that's free, but something having just an od can never do.
It also doesn't need a adapter or close to 8" longer shaft.
For a 400hp dd it wouldn't matter what you used, but having more choices is always better than 1
