Barb in Louisiana

I do it the simplest way which is to add a border around the block using the backing fabric or add sashing between each block that is the same color as the background fabric. Floating seems to work better with a solid fabric color. If you are going to float every block, then use the sashing technique. EQ7 does not allow for sashing without the cornerstones. I would cut one of the center sashing pieces as a width of the blocks after you have sewn 1 sashing piece the length of the block between each block in a row.
:
1. Make your block
2. Sew a sashing piece to each block in a row except for the last block. Usually 1 or 2 inches width but can be any size you choose. Sew these block sets together making sure there is a sashing between each block. But none on the ends of this row of blocks.
3. Measure the length of your row. Cut and add the same size sashing for the length of the row. Sew it to one row of the blocks, then add another row of the blocks to the other side of the sashing. You only need sashing between the blocks.
4. To float the center, add the same size sashing as a stop border around your center rows that you have pieced together.