I got what I wanted - a dog aggressive dog to train. Huzzah! Not sure to what extent, but today there was a LWD (Little White Dog) that he stood watching, and as soon as the LWD saw him it started pulling frantically to come see him, Chewy ran at him growling, hit the end of the line and then decided it was a better idea to walk with me. Didn't go after any other dogs (we saw several) but he did watch them pretty closely, and none of the other dogs noticed him/tried to approach him (thank God, there were two off leash dogs that luckily did not notice us)
He needs to be reminded not to barge through open doors, but remembers pretty quick, and it IS only day two. Good little dog, slept all through the night at my feet.