Finally decided on hand quilting for the Disappearing Hour Glass Quilt.
Because it is a Study - the stitches are connected with making the block.
The white thread is for the stitching lines, the red thread shows where has to be cut.
Going to one corner I made a bigger stitch and realized that I could berry the thread in opposite direction and this would give more stability .
Made the knot as usual.
And berry the thread in back direction along to the stitching - this makes the thread invisible if the fabric is light.