Yes, it's official! I can now use the ball-thrower and throw underarm without any risk of harm to Steve, or halfway around the world, overarm, with pinpoint accuracy. A huge leap from how I threw with it a month ago.
In fact, our current dog and I have been having so much fun with my throwing that my right bicep is now obviously larger than my left! Perhaps it's a good thing that our new residence next week is a cat household :-)