So I tried two other methods - and I don't like them LOL ... too much folding and gluing ... big pain!
And I really like the method I am using, so I found a solution to the bulk! Once I have four squares sewn together, I sew a zigzag stitch up both ways ... The white square (on my quilt) will be hidden by the fabric, so no one will see the stitches LOL and it really flattens in out!
Thanks so much for the tips!