When I find a color that I feel I must have and it ONLY comes in a small spool. I will use a neutral blender thread alone with the perfect color. If I want the color to show on the back, then I quilt backwards (bottom on the top and my bobbin thread is the neutral). I will use the perfect thread in the bobbin if I have to use the neutral thread in the top for SD. I've used Gutermann for years (because my machine loves it), and this is how they roll.