What fins are you talking about? Are you talking about a hydrofoil that is bolted to the anti-ventilation plate? or a set of fins bolted/welded to the pontoon?
Howdy Russ<br />Those are usually called lifting strakes. Although they are pretty common, I don't think I've ever seen 'em on a 'toon. What has been your experience with 'em? What size engine?<br /><br />c/6<br />Hooty