ORIGINAL: Dave Wilshere
Yep, it is dutch roll. I'm sure the rudder gyro will help alot. Adding an aileron gyro smooths out the whole flight pattern, look at pilots like Steffen Volker, Tommy G, Ali, Seb Silvestry that use them on quite a few models.
Is it dependent on the type of model Dave, mostly being scale?
I've worked/helped Ali on pretty much all of his models in the last 3yrs, and never seen a gyro in any of them. Are you getting a gyro confused with his super smooth thumbs?