pal
Perfect Alignment Laser of te wel PAL. "PAL makes it so easy to hoop square. I just line up my inner hoop's horizontal and vertical center markings with the illuminated crosshair, firmly hold the inner hoop and insert it into the outer hoop. Now I know my fabric is square in the hoop. At the sewing machine, PAL helps me guide the fabric edge for precise seam allowances. I don't know how I survived without PAL all these years." - Eileen Roche
https://www.youtube.com/watch?time_continue=7&v=l1gYKCXG8-M