Oh, yes tangle up thread, but it should have been sorted out with a basic clean up? Is the bobbin case correct and undamaged? Like with bkays thread on her misbehaving 401, a lot (!) of issues will work out fine after a thorough clean up and going over every little detail step by step. The Damaskus looks very nice though, 8 revolutions is the sign of a light running machinery :- )