With regard to digital x-rays, the original question. I believe, asked about residual payments, etc. Most systems to my knowledge do, in fact, carry support fees for their systems. I currently use ICRCO’s system and I love it. I believe that yearly support fees are something in the order of 850 dollars. At the time of purchase, this was not told to me I was surprised when I sent a bill, as this was something I clearly asked of my salesperson. Having said that, the support is there when I need it, and I am happy with my purchase.