Also, this was my first mini-project on a knit fabric, rather than woven. I used a small zig zag stitch rather than a stretch stitch - 2b had recommended this and it worked beautifully. So, now I am feeling a little less fearful of the black jersey I recently purchased.
Naturally, now I am planning to go thru all my tee shirts to see which ones could fit better. Oy vay, another can of worms has been opened.