Quote:

The notches don't make any difference,the vanes are at the same angle on all of them. If they were at a different angle that would matter but the notches are just cuts in the steel from manufacturing and have no affect on the flow. The Milodon pumps work well,I have used a few of them.
Keith



Does the full backing plate on the Milodon make much difference?
Does anyone make an 8-Blade pump with a backing plate?