563 has a larger U bobbin and is a vertical hook (top load). 1541S uses side load M bobbin. Both have their advantages and both killer machines. U bobbins are really nice but horizontal hook machines seem to be less fussy about holding your threads on take off.
@Adam12 , sent my juki to the Adler dealer and they tuned it. It is ready to go a brand new really 563. I am going to be curious to try this as I really like the Adler how it sews.
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