Looking for posts on timing, I was happy to find this as I own a Juki LU562 which I guess is a very similar machine to the 563. Just had a major repair done-$$$ replacing the bobbin case and hook, and things are running much better but I'm still skipping stitches which is disappointing. I'm going to use the above information to check everything and see if it helps. Just noticed this thread has not had a post in over 5 years but am so glad it was still an available resource!