I have a huskvarna viking platinum 16 and it will take any thread I give it. It is basically the same machine as the sw 16. I had trouble with tension when I got it. I am not used to adjusting the bobbin tension, but found that sometimes I need to do this depending on the thread I choose. Also need to adjust top tension sometimes. I make a quilt sandwich and test the stitches before I start on my quilts so that I am sure of the tension settings. I also bought the sure foot ruler foot/open toe foot that is available for the sw 16. Fit my machine perfectly.