We practiced SAS off when I flew Seahawks and Blackhawks.
The trick to doing this was to be your own SAS: anytime you put in a control input or correction, you then put in a counter correction. (A bit like teaching a newbie how to fly formation, in terms of technique). The other technique item is to not make large control inputs. I may be able to find an old diagram from a pdf version of a NATOPS manual to amplify a few points, but Jack Carson covered most of it.
It's flyable SAS off, but it's a bit more work, and a variety of AP features will of course be disabled.