Yes you have to move the ruler as you trim. It is helpful to lay it out on a large surface when triming. That said- I also sew with the points on top so I can make sure I am sewing close enough to the points but not over them. Even if I have to adjust seam allowance( make smaller /larger) to keep points even. I just made a "Winning hand " quilt and E. Burns said that block could be squared up with 1/4" seam allowance or 1/2". The 1/2" seam will allow the points to "float" so sram width errors will not be so noticible. Or another idea I heard is to "snap a chalk line" up the side of the quilt and use that as your cutting line. Haven't tried that yet but sound like a good idea!!!! Also make sure you measure your top through the middle when getting border length. Do not measure on the edge. That way if you do have stretch you can ease it in to the border fabric.
Last edited by bigsister63; 10-23-2012 at 08:11 AM.