Randy what diameter were the props. That 4 blade dewald does not look any of his cleavers I have or have run. Maybe the rounded tips?
From what I have seen and been involved with other 400r cats the 5 blade props by far work better for some reason. Also you should take to Dave. He putting the finishing touches on some 32" 5 blade over the hub cleaves like the mercury version they sell for 10k. Also has a wide range of thru-hub 5 blade cleavers also.