i own the viking 18x8 which is in the same family as tinlizzie and pfaff. i use king tut on top and bottom line in the bobbin. joanns sells king tut now and it just went on sale today online only. i've used star/coats&clark/aurifil those threads produce a lot more lint than king tut, but if you clean your bobbin area often they should be good to go. enjoy your new toy!