Same here. Lots of times, great things are stumbled upon. It wasn't like one day I said I am going to forgo the mill and everything that worked in the past and go with this new way with all the money I have riding on it. Apprehensive would not begin to describe it. We had a few dogs here and there that just did not get the idea of mill work or biking, etc. etc. "Traditional" methods just did not work. It is amazing the resolve of a person when the $$$ is on the line.
The ball chasing bitch was in phenomenal shape. I too was weary going in but at the time it was the only option with her. But after seing the results we started incorporating it more and more with other dogs.
My latest invention (makes me sound important) I have a 5/16" cable strung out about 310'. (off a double pull hoist for a five story lift). I have one end to a tree and the other to a "T" bar I made to the hitch on the truck. I put stops about 10 feet from each end with stainless pulley from tank entry equipment. I have a three foot lead swivelled on both ends. It stretches along the path I live one. I hook the dog up and zing by on the four wheeler. For whatever reason they chase it like all get out. It has become a staple of the work. It works. EWO