As mentioned, I would update this thread once I installed and used the Cobra Jet AK-19 Ultimate Deluxe (AK-19 UD).
First Impressions: Unboxing the components, everything is nicely machined with no burrs or sharp edges, new hardware was bagged and a package of thread seal was included. Installation went smoothly and there is a very detailed YouTube video online explaining every step of the way. Install was roughly 30 minutes (or two beers), this included disassembly of the factory items to make way for the new items.
Test Ride: First ride with the AK-19 UD was Sunday on the Manatee River. Wind started off non existent, but quickly picked up as the temps warmed up. At idle speed coming from the ramp, I would say the the steering responsiveness was 75% greater improved. Turning the wheel port to starboard (full turns) the bow took about 3 seconds to correct and respond to the change in direction. Moving in a forward straight line, you could easily make 45 degree corrections as if there was a prop. The added planing surface did drastically help the boat jump up on plane without cavitation about 50-75% quicker than without the planing surface, this was with 4 adults and 3 kids. In average 1ft chop running into the wind and across the waves, the ride was smoother, as my wife was not complaining to slow down or stop the boat from bouncing. Maybe its me, but I feel the planing surface did help the left to right level out.
Docking with a cross wind: Here was the ultimate test. Docking at Whiskey Joe's with a 15mph crosswind pushing me away from the dock. Told the wife, no need to reach for the dock hook, lets see how it works now. I approached the dock perpendicular, cut the wheel and slowly engaged reverse, again, responsiveness was almost immediate. I was able to slide in the dock and reverse back without yelling or causing a scene at the bar.
Fin Settings: I chose the recommended #4 and #5 setting, keeping the fins down at all times. Not much noticeable difference at high speed as the boat tends to slide more across the water than dig though the water as I was not looking for added control at higher speeds. Running wide open, there was no steering track or pulling in any direction.
For anyone looking to increase steering and decrease stress on a jet boat, this is well worth the purchase. I purchased this unit based on reviews and testimonials, and for what you are given, less than $300 is well worth the investment. Understand this is my only steering system purchase and I have not had the chance to use a competitors product, and am not biased to any product.
For fit, form and function, it met 100% of my requirements.