I just picked up a Vendo V540 for 500$ today. I've got a few questions on it. I'm slightly confused by the model number, is this a "Vendo Vmax V540 live display" Are there any manuals available for these? I'd like to figure out how to set it up and program it. It seems like it's outdoor rated, I read in a topic that they make heater kits for them, where can I get one? How easy is it to add a credit card reader to it, what does that all entail? Thanks in advance!