Okay, here it is. It took some finigeling but I think I got it. It’s still a bit too wide at the shoulders, but then the original shirt also was. I ended up making darts in the back of the shoulders which helped some. I like it much better than the original shirt, in any case. Had to add a row on 2″ squares out of the bag at the neckline as it was a bit to low for the high cut sports bra which is my favorite. But I think they are kinda cute, anyway. So here’s the next steps. Mine- & you can see where to avoid this many with a little planning on yours!
Pinned the patchwork to the shirt at sleeve seam and shoulder. Then top-sewed it down. >>> Then took out the shoulders because they were too wide. Sewed the dart in the back and the re-pinned and top sewed it again, easing the blocks. I also pinned and top sewed the bottom of the patchwork.

Then I cut out the section of the shirt under this leaving a half inch of “seam allowance” in case I needed it. You never know. I hope you can tell that this is inside-out here.

And now it’s done. I am pleased with it, all in all. Used up a bunch of squares out of the misc bag and have a colorful shirt to wear this summer just by remodeling one I already had and didn’t wear. Meanwhile, I am still weaving for the tunic. But there are more blocks in the misc bag, too….

Just wanted to add a note here. I tossed this one in the washer with the regular laundry and it came out just fine. May have fulled a tiny bit but no shrinkage or distortion, not unraveling. Did just fine, which pleases me no end!