This year I have made 5 of these. I was actually paid for one of them.
I would do another one if someone paid me. They are not as bad as I imagined they would be. The interfacing is the pits, but that was the worst part for me. Then they are like big blocks so they go together fairy quick. For the shirts that were different sizes I did one of 2 things. Used fabric from the back of the shirt to piece it to be as big as the others. Or on one I just left everything the size they were and sewed them together. I liked both ways (sashing or no shashing)