I thought the role of HAC was to function as SAS 3? That and the hand of God on the collective or collective outer loop actuator.My first underway, I rode the controls on a DH (now in the Nuke pipeline, great guy) on a daytime approach to a CG (also first time seeing a CG) and he tried to nickname me "SAS 3".
I'll say the HOTAS nature of T-6 trimming, plus TAD, makes it a fuckload of a lot easier than the turbo-weenie. That thing required near constant trimming for anything.
Most of my on-wings were trimming pretty well by the end of FAMs. You'd see poor trim pop up again in Forms when all the brain cells were in use trying to not hit lead, but usually it'd tamp down after a flight or