...or have up close/personal experience with someone who's done so. It would seem as tho' the walk-thru feature of these more modern transoms would need to be encumbered by a mount to which the vane would be attached, and I'm also wondering about the structural compatability if the vane were of the rudder type (e.g. Hydrovane, RVG, Windpilot Plus, etc.) For those of you who are knowledgeable about the 34/36 owner sites, tech articles etc. that must be out there, I'd welcome a referral if someone has tackled this. Many thanks! Jack jack_patricia@yahoo.com