Prop should be ok, I ordered one of these just to check it out, it came with some tool marks, you may have to use fine sand paper to smooth it out. It is light and I did not verify if it was balanced . Quite delicate so be careful when handling it.
The SW26 BL V3 has a 1500kv motor and the recommended cell count on the ESC is 3s, that means the motor is turning unloaded rpm at 16650rpm---reason that you find it being a tad slow. It is meant to be an entry level BL boat, not stressing out the buyer. As you get more into FE, you may want to get another boat or swap out the ESC for a 4s capable ESC. That motor is certainly able to run on 4s. But you need a different ESC!
What I am trying to point out is that with the stock set up, you are pretty much seeing the speed potential on 3s. Don't be disappointed when the after market prop doesn't give what you expect.
Cheers and happy boating!
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