Hello, I just bought a used R1 from a yard sale. The seller knew nothing of the condition of the printer so I got a great deal on it. I need to get it up and running. I know the extruder has a broken pressure bar and everything else looks good. My question is, how do I test it since it has no sd slot and no lcd. All my previous 3d printing experience is from printing with SD cards and lcd operation. Once I figure that out i'm looking at upgrading what I can to make reliable. A list of suggestions or a link to a good source would be awesome.