Edward_t Thank you for your honesty, but the TK5 system by Davis Derby is new to the US market, so the systems that you are talking about would not include the TK5. I will keep you posted on how things go as i set up dealers here in the US and i will work hard to find one in SC as soon as i can and hopefully this system will change your mind. Also these systems are put in place in conjunction with training. These systems are to installed for accountability as well as reporting. Some systems are better than others and that is why i chose to represent Davis Derby.