Re: line kick
To add to what Jackster says, if you use the "O" ring method of shooting line, you can feather the cast to rub off excess energy. Since I cannot post links to blogs here, do a Google search for "O-RING METHOD (SHOOTING LINE)"
When you have overpowered a cast, close your fingers around the line to create friction that will slow the forward line velocity. This will slow down cast and prevent bounce back.
The good news is that when the fly kicks down, back, and under on the overhead cast; you have just learned the tuck cast. You just need to know how to control it, and the O-ring shoot will help with that.
"Discovery consists of seeing what everybody has seen and thinking what nobody has thought"..........Szent-Gyorgy