I commend you for your effort.
However I just have some questions for you:
Have you've done any secondary marketing research or paid for primary marketing research on the current environment of the tuner market, demographics, revenues, market saturation, locations and then relate that to your ultimate target market?
What will be your defining differentiator? Why you? Why your company?
What gaps in the market place are you looking to fill that the industry is ignoring?
What business threats could you possibly face? (trends, economy, lifestyle changes...etc.)