I finally got time to get my 603 sewing - and I didn't throw it once! It's sewing very nicely now. The tension was all messed up, which had messed up the reel holder. Fixed the tension, then had to adjust the reel holder. The older machines are definitely much easier! Now on to that 66 for my sister - I have a feeling all it's going to need is a little bit of oiling (and the slide plate cover and spring.)