This is my 1st CTD, have been looking at getting some gauges for boost & egt for sure. I've seen the edge A2 and really like the looks of it, does this monitor work alone or do you have to have the juice also. Warranty is a concern so I don't want a box at this time. Have also seen the x-monitor any experience with this? I'm leaning towords digital type gauges. Any advice? Thanks in advance!!!