Here's what I've found on high performance aircraft:
Even though my elevator and aileron forces are light on my Harmon Rocket, the wide speed range of the aircraft can require a lot of pitch trim changes until the aircraft stabilizes in speed.
If the autopilot is engaged too soon, the autopilot may ask for more trim adjustments and can settle into a configuration where the trim is fighting the autopilot servo. This extra load on the servo can then lead to slip in turbulence.
I was going to upgrade from an sv32 to an sv42 until I thought about the problem... It was a trim issue, not a servo power issue.
The solution I came up with is a trim controller that provides autotrim for the SkyView . It's an open- source design, but available as a finished product as well from MakerPlane as the M-PWR-2AT. Here's the project link:
http://54.166.95.70/redmine/projects/m-pwr-2
I've been flying this in my HR for some time and not only does it eliminate slipping, it lowers workload and keeps the aircraft in perfect trim. The trim controller provides fail-safe operation and speed scheduling as well.
Vern