Downwind with the autopilot?

Hi you cold Northerners, I have a question for those of you with tiller pilots...
...Downwind in a moderate breeze 15-18kts and 1.5mtr swell I find steering Tiptoe quite hard work, mainly I suspect due to her middle age spread and center of buoyancy changing with the roll. Tiller loads are normal when upright, lee helm when rolling to windward, weather helm when rolling to leeward. Anticipation is required to minimize the zigzag course that ensues.(good for the stomach muscles though!) Sometimes scary with an odd wave thrown in.
Personally I suspect that a autopilot will be way behind but perhaps some of you may have a cunning fix to the problem? Maybe a deeper rudder?
Happy varnishing and tinkering,
New Zealand Dennis
...Downwind in a moderate breeze 15-18kts and 1.5mtr swell I find steering Tiptoe quite hard work, mainly I suspect due to her middle age spread and center of buoyancy changing with the roll. Tiller loads are normal when upright, lee helm when rolling to windward, weather helm when rolling to leeward. Anticipation is required to minimize the zigzag course that ensues.(good for the stomach muscles though!) Sometimes scary with an odd wave thrown in.
Personally I suspect that a autopilot will be way behind but perhaps some of you may have a cunning fix to the problem? Maybe a deeper rudder?
Happy varnishing and tinkering,
New Zealand Dennis