I quilted a king size quilt, approx. 110" x 110" on my Sears Kenmore machine, then I did a couple more king size quilts on my Janome 4000. Granted a queen size is a little easier, but taking it slow, making a puddle with the quilt so it goes through the throat easier helps too, as well as having a large table or tables to support the quilt during the quilting process also helps. I have also quilted quilts where I had the quilt supported on a large table up against a wall so that the quilt would not "fall off" and create a strain on the quilt. I say, just go for it.