I've quilted the flipped-over edge of the quilt and pieced without a bobbin for two feet, but those were all correctable mistakes. Today I glue basted a quilt on which the placement of the blocks was critical with two misplaced blocks. I had taken a picture of the quilt before I sewed the blocks together, and it was perfect. But when I sewed the blocks together, I turned a group of three 180 degrees. A couple hours after I glue basted the quilt, I stood back to admire it - only to realize my mistake. No going back now. My only consolation is that it's a lap quilt and will rarely, if ever, be laid out flat. For a perfectionist like me though, this is hard to accept.