Having trouble w/my blocks coming up undersize. Had some come out fine and some 1/2 inch too small - using the same thread and my 1/4" foot. I'm adjusting my thread tension and sewing sample block before I cut into anyone's fabric. Really frustrated - I'm sure a machine check-up would help but as I only have the one machine I'm kind of stuck at the moment. I tried switching to Superior threads Bottom Line because it's thinner but could not get the tension right to sew with it. It would literally slide right through my fabric when I tried to use my threadcutter no matter how I set my tension. Will see how the sample blocks come out and go from there.