It will really change the motion when the water depth gets down to about 20
feet. Up here in Maine, it will quickly pick up a bunch of lobster pots and
become are really effective hydrodynamic damper.

A common anti-rolling device for use at anchor consists of something like
plywood triangles with rope bridles hung over each side. The bridles pull
them flat through the water. One edge is weighted so that the sink edgewise
and quickly when the rope is slackened as the boat rolls towards that side.

Very effective from what I've heard. The metal fish that you see fishing
boats towing on outriggers work the same way but are designed to tow at
speed. No similar solution for pitching though.

If you are experiencing hobby horsing, your solution would probably bring
relief making you feel clever. The result would probably be because of the
change in speed though, something you could have done more conveniently and
safely with the throttle.

--
Roger Long