I've rescued the quilt as best I can but I am worried that the sides may still be a little on the diagonal and not sit as straight as I would like.
I'm thinking that for future strip quilts I'll iron the strips in half (or finger press) and align from the middle.
The left over bits have not gone to waste. I've used them in a peiced strip of piano keys on the back.
I'm quilting in straight lines of quilting using my walking foot and aligning the rows either side of the seams and if the strip is wide enough, just in again the width of the foot.
Looking at it now, this was probably not the ideal quilting method for the pieced back because the quilt lines haven't matched up perfectly on the back with the pieced section. I should probably have stippled and then it would not have been so obvious. So whilst I haven't wasted any fabric in the scheme of things, I'm not totally thrilled with the outcome. Just lucky I haven't any plans for a recipient just yet. I'm holding out that it still might all work out in the wash but if not, I'll put it down to a very big learning experience!