Use a stabilizer. Cut just sleeves and neck/back off leaving as much as possible of shirt. Then, cut stabilizer bigger by 2 inches or so all around and iron on back of shirt. Then fussy cut shirt. Look at picture section. I just posted one that I thre together. All blocks are finished at a multiple of 3 ( unsewn 3.5, 6.5,9.5 etc) and then positioned like a jigsaw puzzle...