I have a 115 Yamaha with which the corner of the cavitation plate has broken off. I've experienced no loss of performance, and it seems to get up on plane just fine as well as make easy turns at all speeds. <br /><br />I was thinking of pruchasing a Hydrofoil. On my cavitation plate there were four pre-drilled holes, now after the loss there is only three. I was leaning towards the Sting Ray Hydrofoil where it has four pre-drilled holes as well to mount to the plate. <br /><br />Can I get away with using only three? <br /><br />Should I have this repaired prior to installation?<br /><br />I assume I could have somebody weld a new corner on, but at what expense am I looking at?