ctmein

I too think it would be better to applique the circles. I use a template circle, place the template on fabric, leave 1/2 inch or so beyond template. Place fabric with template on to tin foil, pull the foil up tightly around the template and iron the edges of the foil circle, let it cool(it will burn your fingers) and then applique to the quilt. You can applique by hand or machine. I do by machine and use a very narrow zig zag. Perfect circles every time. One of the best quilts I ever made was an adaptation of "Bubblicious" by Marj Moore. I have attached photos. Good luck.