if your trying to get the bow to lift, what about a tempest? I've never had much luck with them on boats I've tried them on, but I figure they must work on something otherwise they wouldn't still make them. they have more blade surface than a laser, and seem to work better on heavier boats liek the V(vs a bass boat). As far as four blades, my experiance has been they will lift the stern, pushing the bow down, unless its a high rake fourblade and they generally work better on light boats. If you can't find a 23 Mirage to try, carry your 21 to a prop shop, tell him you need 200 rpms less and soem bow lift, a good shop should be able to dial it in on teh prop you have.
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