Congrats on choosing a 460. Great production boat for the money! We’ve owned ours from new. Last year I did a lot of research to choose a self steering vane. We were going to do another Caribbean cruise and wanted to augment our electrically driven autopilot. Hydrovane and Cape Horn were the final contenders. But the project didn’t get past the drawing board as we’ve decided to sell Spirit after the Bahamas cruise were presently on till about mid July this year. Then back to Florida and very sadly put her on the market. Just time for us to do other things. But to throw my two cents at your question...I found some design advantages to the Cape Horn that were very attractive. The imposition on the swim platform was going to be far less complex. A single Stainless pipe extending out from within the port lazarett (it would have come out through the aft face, below and inboard of the hand hold, but outboard of the boarding ladder). No large center line appendage on a frame where the wind vane is attached directly to the water vane as in monitor and others. All in the way of stern platform activities. The pipe could even be removed and a plug inserted. The water/steering portion may be controlled by an electric autopilot rather than the wind vane, thus eliminating (or redundantly instead of) the need for a rotary motor bolted inside your cockpit console below the quadrant chain driving the wheel shaft. It can be controlled by its wind vane with control transmitted by lines for port and starboard. Offset would be no problem on the 460/66 as it’s a very well balanced boat, as long as you don’t over canvas (especially the main). Reefed main to below upper spreaders with about two or three wraps on the jib furler results in 5 plus knots speed close hauled to wind at about 32 to 38 degrees off in 7-12 knots of breeze depending on sea state. That’s going to be with about 3-8 degrees of weatherhelm and 15 or less degrees heel. Wife is very happy with this type sailing. So, my point, the trim rudder may be offset and it doesn’t need a lot of power if you sail the boat with minimum canvas out and nicely balanced. I guess I was pretty decided on the Cape Horn. So I encourage you to take a look at the Cape Horn. I’m not affiliated with any of them. And I also think you can look at the YouTube video bloggers called Sailing Uma who installed one and seem to really like it though they are not a stern scoop boat. Good luck. By the way, where are you hauled where they use timber rather than jack stands?