Bob:
You mean he's even better than he was when I was down there? He was pretty durn good then!
re: electronic collar. There are different brands on the market, and some come with different length probes so they can make contact with the skin. Sometimes with long hair dogs, you have to shave the hair where the probes will be so they can make contact with the skin. Tri-tronics and Innotek are the 2 brands that I'm familiar with.
Jim Dobbins has a great training library on how to properly use the e-collar. I can't stress enough that they are NOT to be used to punish the dog, and they take some learning on how to use them properly. They aren't a solution to training, they are just another tool in the toolbox. I'd say she wears it maybe 10% of the time when I'm training her, and only after she knows what the command is, and starts to ignore me when she's at a distance away.
http://www.dobbsdogs.com/catalog/index.php?main_page=index&cPath=25_32 I have a bookshelf that is almost completely full of dog training books, and Richard Wolters has some good books out there.