I have made numerous T-shirt quilts. I only use stabilizer if the T-shirt is very thin. Otherwise 90% of the blocks are without stabilizer. I do NOT send mine out to be quilted. Instead I quilt them on my domestic machine. I stabilize the quilt by stitching in the ditch of each block first. Then I go back and stitch in each block. here is a link to one of my T-shirt quilts. look for the entry by lakekids
http://www.quiltingboard.com/main-f1...ml#post4790296