See below for a test run that we made today. Everything went quite well although it took some time for Dave to pull as he's been trained not to pull on the leash. Everytime he felt the kickspark tension he would stop but after a few tries he managed to get to grips with it. We are still waiting on the proper pulling harness to arrive, so hopefully when Dave has been strapped into that he'll be able to pull a lot better.
Oh, and Dave loved it!