Have very limited experience but the Ring I recently bought had a cleaver/solid hub fitted and on the test run I made with it I found it cavitated like hell.
Unfortunately due to other issues I had at the time I didn't get much chance to 'play' to much with the set up.
Next time out I will certainly start with standard prop since it is known territory for me but will give the cleaver another shot eventually
The less time I have to work, the more I get done !!!