I'm not bad with electricals but I don't have the equipment, then when you find someone that has you get the well its probably this but then it could be that on and don't forget the other as we know they have issues, what they really mean is they have the kit but no idea as to what's wrong.
I know I have a communication error, I didn't need a download to tell me that but what I did need is the communication error is there or in this unit but that's too much to expect and I'm not into spending mega bucks on hit or miss ideas. yes I get very frustrated at not being able to identify the problem.