I believe your layout is called 'furrows'. Nicely done.
I laid mine out in 'All Sevens'. I then quilted a rectangle around each row side to side and filled the rectangles in with smaller rectangles each smaller one following the width of the log cabin strips. I then turned the quilt 90 degrees and did the same thing to the columns.
Quilted three squares around the quilt in the border, called it done.
tim in san jose