I'm a little late responding to this, but wow! You did an amazing job, and you should be very proud of yourself. I've done a little filet crochet in the past, and I know from experience that it takes forever, so I applaud you for finishing.
And you designed it yourself, too! Seriously, this is awesome.
And I love your idea of using toothpicks for blocking pins. I never thought of that, but I can never find my pins when it's time to block, so I just might have to steal your idea.