My m20k has the kfc-150 flight control system - today after putting in six new cylinders and a new engine monitor, while taking the plane home from the shop and bemoaning the new state of my bank account, the autopilot decided to commence to rock and roll - the deviations are slight, but bothersome. It will track the heading just fine, it just "Hunts" wile doing it. The rolls are slight, maybe 2 degrees to each side. Anyone having experience this, can you tell me a good shop for kfc repair, and what was the issue? Thanks.