Baste, Baste, and Baste
Basting the pieces by hand proved to be the most important step. I didn’t want to use the iron on web for eco-friendly reasons and I tried pinning the pieces before sewing them. But see the picture in the middle when I used the pinning method? The corners buckled when I sewed the t-shirt panel. So it’s important to baste the pieces first and you can adjust the stretchiness as you sew.
So, spread out on the floor, crank up some music, and baste by hand. You’ll thank me later.