Do not rip it out again. It's too much work! Really examine some of the quilts you see in magazines and you will see that many of them have seams that don't quite match. If the magazines can't make everything match for a quilt that they display to quilters all over the world, then you can forgive yourself if some of the blocks don't quite match.
Just keep trying to improve; eventually you will be more perfect. But no one has ever made a 100% perfect quilt!
Besides, the problem could be a cutting problem. You can't undo a cutting problem unless you have enough fabric left over to re-cut the quilt or even parts of the quilt, again.
One last thought: Sometimes the blocks are fine, but matching the seams where they intersect is off by a bit. We have all gone through that, and, sometimes, in spite of our best efforts, the seams simply won't match no matter what technique you use to match them.
Before you sew the blocks together, try using some elmers washable glue sticks to hold the matching seams together before you sew the blocks together. The seams should nest together. The glue makes it harder for the matched seams to move when you are sewing them together. If your seams don't match by 1/8th of an inch, this method will help you ease (slightly stretch) the extra 1/8th inch into alignment.
Last edited by cathyvv; 04-20-2016 at 06:44 PM.