i am sewing strips together. my teacher told me to put the st. lenght on 20 or my machine shows 2.0. anyway she that is a tighter st than the 2.2 i was going to use. then we are going to cut the strips to make a bergello. so no matter if i put the tension on 3 or 4 and used 20 and alternatered my strips or not i still have a bow or curve in it. i am now taking out some of my strips to start over but want to know if i go with the 22 is the stitch going to be too loose as my teacher feels it may be. hope i explained this well enough. i am about to pull my hair out. my next class is this next weekend and i don't even have one set of 10 strips sewn together. hope someone can help me.