Tail draggers ain't really harder than tri-gear. The secret, at any scale, is to be ahead of the plane. Give a little control the way you think you'll need it and continually correct. If you wait for the plane to get out of line, you won't easily catch up. I found this out flying full-scale TaylorCrafts and Aeroncas. Fly the plane from throttle up till it's back at your feet.