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Not to start a ruckus but this is why I prefer metal blades to plastic.Yes, you need to check the w/p bearings regularly but I would do that anyway. As this thread indicates ,dismissing metal blades because the plastic ones do not abrade the crankcase half is only a part of the issue and open to rebuttal. Distributed broken plastic impeller blade parts cause different but expensive problems.
I do so wish Porsche had waited a little with the M96 and just copied/scaled up the Honda Valk flat 6. Lancia Flavia, & Subaru.
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