I have mine mounted to where the inboard side of the plate and hydrofoil are in the air
the water flow just covers the water pickup on the lower unit. The outboard side just gets splashed no true contact with the surface. by your picture I would start with 3 holes
and go from there, just make sure your water pickups have plenty of water flow over them.
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1979 23 SCEPTRE TWIN 150 Opti's/GAUSE BUILT BRACKET
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