Hi Stuart
Machine with problems was an Intel Celeron (not Pentium) CPU 2830 2.16 GHZ 4 GB Ram (3.82 useable) running 2016.3.1. CPU more likely the culprit, as my AMD4 with 4 GIG RAM flies 172 decently.
No real change on HUD "ball" with power settings. Once in bank balanced flight retained, though
some skid happens with abrupt control movement. In trail plane wants to wander all over in pitch and roll, regardless of speed between 70 and 120. Takes constant small control movements to maintain straight and level flight. Greater stick movements elicit abrupt and more substantial change in attitude than one might expect, considering normal inertia.
Think original crash problem caused by prematurely leaving runway, as got around it with
nose down trim and delaying take-off until 80Kts.
Best Regards Dilbert