I guess I use a variant of that. I bought a Schaefer cleat that fits on the 1-1/4" outboard genoa track.
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When I come into the dock, I loop a line from that cleat around the aft-most cleat on the dock and then back to the primary winch. After a bit of experimentation I found a spot for the cleat that put the line at an angle where the boat just sits quietly against the dock long enough for me to jump off and put on the real docklines.
I'm fortunate in that my slip faces into the prevailing wind, and is sheltered from a southerly, so I almost never (knock on wood) have much of a cross-wind to deal with.
For undocking in normal circumstances, I just put the motor in neutral, pre-set the helm a little to port, untie the boat and manually walk it out of the slip. the stern drifts a little to port as the boat moves aft, and by the time I've climbed on the boat is most of the way lined up with the aisle... opposite helm, a little forward thrust and I'm on my way.
I have had to undock a number of times in significant cross-wind, most recently in Port Ludlow. If the wind is pushing me onto the dock, that's OK, my normal approach (walk the boat out and let the stern carry some angle) works OK. If the wind is pushing me OFF the dock, that's harder... I don't want to let my bow blow down onto the boat next door.
What I've played with is a knot (I have no idea what its called, I can't find it in Ashley's) where the entire bight of a line is run around the base of a cleat, and then a slip-knot is tied around the standing portion. A tug on the tail frees the whole thing (no need to "unwrap" the line from around the cleat - tug on the tail and you're completely free).
this isthe general idea:
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What that allows me to do is untie the regular docklines, walk the boat halfway out of the slip and secure it with this temporary leash, get onboard, put the boat in reverse and then "pull the rip-cord". So far, so good... the boat - at least the handful times I've tried this - goes from parked to moving astern (and under helm control) quickly enough that the bow doesn't really have an opportunity to get off-track.
$.02
Bruce