I recently bought a 1990 Bayliner Capri 1700 with a Force 50 HP Outboard. I live in Colorado and was just boating at a lake at 9,000 feet. The boat performs great but I would love to squeeze some more HP out of it. The seller gave me one of those hydrofoils which I haven't put on yet. Do they work and what are the benefits/drawbacks of them? What about Boyesen Power reeds? Are they worth the money? I am also considering using higher octane gas: is it worth it? Different prop? Any other suggestions would be welcome.