I've got a Gen III, but I think I might want one of those pumps.
Brian Trubee

I think the third gen pump is made by Kabota and has a sheet metal
impeller. There have been lots of variations in impeller shapes over
the years. Some of which are downright beautiful.
Here is the third gen compared to one of the nicest Cosmo 
impellers.
 
Paul Lamar
 
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