Re: Less force, more power. Contradiction or not?
Grandpa used to say "Get your butt behind you!"
First thing I do is check my stance. Get comfortable. Then check my grip (remember the scene from "A River Runs Through it?").
My biggest problems are on the back cast. A weak back cast= BIG problems of all sorts. A good, strong, sharp back cast and I find the (fore?) cast is just aiming and guiding the fly to where I want it to go.
In short: It's all in the back cast.
I've only fished for 10 or so years, so I'm not instructing here, just passing on my experience.
My advice is worth what you paid for it.