Prescencia 50 wt. thread is, IMHO, the way to go. It is very lightweight thread, so you can get a great scant 1/4" seam. My touchy Bernina loves Prescencia thread. I buy it by the cone. No lint, no knots, just pleasure. Might as well use the best thread you can get. If not Prescencia, buy 50 wt. thread of another brand. I wouldn't go with CT or CC.