I just attempted a tshirt. I hand sewed because I just really didn't want to get the machine out...But I ripped the seams then put one side of ribbon inand sewed it in, I did the other side the same way, then I sewed the top and bottom of the ribbon down, Now this did not work...
I have puckers and on top of that I was lazy and didn't fuse the ribbon down so it is a wave instead of a straight line.
So what I learned, prewash ribbon, fuse to shirt before sewing, do not sew seams until top and bottom of ribbon are sewn down, Oh and don't be lazy GET THE MACHINE!!!
I'm going in again this weekend to try another...wish me luck.