Update on Quick Quilt-Fixer Upper!

Well, I got it fixed - the warbled edges in my piece- such a relief!  Here I am, with iced tea, music, seam ripper, and the piece:

.  Note the smile - I had a positive, can-do attitude!  Here's what I did:  First, I ripped out the seams in the middle of the quilt, except for the blue center strip.  Then I measured down the middle of the top to the middle of the quilt and carefully measured inch by inch along the yellow and white and cut it to the same length.  Then I flipped it over and did the same for the bottom half and viola! It zipped up quite nicely - no more gaping.  Now the thing is sandwiched and ready to quilt, and for once, I know exactly how I'm going to quilt it.  My only question to myself is whether I should stitch in the ditch to preserve the straightness of the lines or just do the overall design.
I know Weeks Ringle, my current guru, is against ditch-stitching, but I wonder if in this case it's necessary, again, to keep everything super straight and crisp....I need some research for this, I think.  I'm going to the Craftsy Class I took from her to see what she has to say.  I'm also going to have a look-see at what another currently hot quilting guru, Angela Walters, has to say about it in her book.  Naturally I'd rather take the lazy way and not do it, but I'm pretty attached to this piece and I want to do whatever will make it look the crispest (if that's a word).  Oh joy, she doesn't stitch in the ditch, either!  So I guess I'm not going to because why do it if you don't have to? 
So far I'm quite pleased with this piece, now that I've gotten it fixed..  It has been rather a challenge, which may be surprising, given that it looks so simple.  But it really wasn't.  I had to be quite vigilant about making sure it was sewn as straight as a  semi-blind girl who tends to fudge and who is also without a quarter inch foot can sew (which, lacking vigilance and discipline, can lead to much stitch pulling, which in turn can potentially lead to cursing and frustration, which is not allowable if one's goal is zen... and which I am zen to report did not happen!   For once, I kept my presence about me, believe it or not!) And any time there is bias involved, it is tricky. But I'm nearly there, and like I said, pleased.

Here it is before sandwiching, hanging flatly on the wall, like it's supposed to.   It's simple, graphic and I love the colors - I think I'm going to call it The Sunny Day, cause it's just so darn happy!