Marlin V 1.1 RC3

[Roxy]

I did mine but screwed somewhere up

I am now going through line n line....

Is there a way to get the current config from the Arduino?

It depends on how old of a Marlin you have. But if you have a recent version, you can boot up the printer and it will print out (to a connected PronterFace console) almost all of the settings. And similarly, you can do a M503 to get much of that same stuff printed out.