Ahh, very interesting, nice to see the impeller design of a fixed rotation pump.
It doesn't need any "modding" as such, if you wanted to do something you could round the edges slightly on the output (from the inside of the impeller chamber, and mabie look at the intake, which from the pics looks to be a little restrictive, but it's difficult to tell for sure.
looks like it'll pump like a champ.
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feel free to icq/msn me, I'm always willing to toss around ideas.
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