Just starting to experiment with reverse appliqué and inner points and stray threads are driving me nuts. So far the best thing I've come up with is to tuck the threads with a toothpick that I stick just a bit into a glue stick - just a tiny dab of glue, then sweep the fabric and any stray threads under. This also works well on melon points with regular appliqué. Tymetoshine your b12center piece looks great! I like the regular appliqué one best. My first try on this block was a disaster. Haven't had the nerve to try again yet.