zipzagger

I just bought a Juki 563 and a BMCO cylinder arm machine at an auction. I cannot find any info whatsoever on the BMCO, nothing. Any info would be really appreciated. Thanks Also, as a beginner, any pointers or troubleshooting or "must have" information about the Juki? I know it is a popular machine, but I don't know anything about it except how to thread it.