You need to adjust the Saturation X and Y in all your inputs to about 70, it work for me very well, at there default there to gentle and any little force on the stick will make it go crazy. Also I have notice that the KH-50 should had been name KH-Trim-Me because that is the only way to fly that box with wings.
Man that bird is a tuff one to fly, i been at it about 3 weeks now and I can see myself getting better and better at it in a month I will be super KH-50 guy.
Also when taking off make sure you push on the stick a bit foward, it is normal for that aircraft to do that. Slight hover pushing on the stick foward and trim and you will see practice practice practice and practice again.