Was great until today. I spent extra time with a picture and wrote on the particulars. They sent a premade Trison diagram which was much simpler but had one small mistake. They offered to send me a blank copy of their diagram. I day later I called asking for it. Very busy no time to discuss all over again was stated. I said I need to fix one small mistake. Your diagram is wrong with one little mistake. "Well then we can't help you, and hung up on me!