AJ made me another quilting tool with his 3D printer!  This is a thread cutter, designed to cut thread when you are chain piecing.  He printed three pieces, and I put a rotary blade between the circles, and it sits in the third piece - the stand.  Then, I can cut the thread quickly between the pieces.  Working on the Falling Leaves quilt gave it a workout - since the block are all the same, I pieced 4 blocks at a time (all I had pins for) so at new point, I had a very long line of pieces all "chained" together. I put a (very bad) video in to show it.