Originally posted by CraigP
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It's not made on a Cnc. They are cast stainless props and they aren't too bad as they come but they can definitely be improved. With my zelos it was 10mph faster than all other boats with stock props vs mine being sharpened and balanced.
Don't put too much emphasis on thinking that a slight imbalance will hurt anything. It would do some damage if the prop was spinning out of the water at all times, when you put the prop in the water everything changes. When I s/b my props I try to get them as balanced as I can but I won't waste lots of time trying to get them perfect. I don't have any driveline failures that I can recall. I've only snapped two flexes in my boating that I can recall. One was a stock impulse shaft on 6s which were known to have issues and the other was my first attempt at making my own flexes, I used the wrong solder on that attempt.
To be clear, a small imbalance has not mattered in my experience. A large imbalance would be worth correcting. The stock proboat props are not far off.

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