This info might be helpful in solving your problem.
I think a cutaway backing will be helpful.
DENSITY AND UNDERLAY STITCHES ARE IMPORTANT
The amount by which you must reduce your density is based on the type of leather upon which you are embroidering. As a basic rule of thumb, reduce the density by 20 percent. You may be thinking this is not going to produce good-looking embroidery and you are right. You must now go in and add enough underlay to make up for the reduced top density and the way you put in your underlay is just as important as the amount of underlay you put in.
Remember that your underlay-stitch needle penetration cannot land in the same place as your top-stitch needle penetrations. So make sure your underlay stitches are placed at least 1/16 inch in from the outside edge of your column stitch. If you are using a fill stitch, place the underlay at a 45 degree angle to the fill stitch and make sure the underlay and fill stitches are at least 4 millimeters long. The underlay should run in both directions at a 45 degree angle, going left to right and then right to left, both times at an angle to the fill stitch. In making column stitches, the width of the column determines the type of underlay to be used. If your columns are less than 6 millimeters in width, use a running-stitch underlay running down the center of your column. On wider columns use a combination running stitch and zigzag stitch, making sure that the width of the zigzag stitch is 1 millimeter in from the outside of the column. (A 6-millimeter column would use a 4-millimeter zigzag stitch.)
I think a cutaway backing will be helpful.
DENSITY AND UNDERLAY STITCHES ARE IMPORTANT
The amount by which you must reduce your density is based on the type of leather upon which you are embroidering. As a basic rule of thumb, reduce the density by 20 percent. You may be thinking this is not going to produce good-looking embroidery and you are right. You must now go in and add enough underlay to make up for the reduced top density and the way you put in your underlay is just as important as the amount of underlay you put in.
Remember that your underlay-stitch needle penetration cannot land in the same place as your top-stitch needle penetrations. So make sure your underlay stitches are placed at least 1/16 inch in from the outside edge of your column stitch. If you are using a fill stitch, place the underlay at a 45 degree angle to the fill stitch and make sure the underlay and fill stitches are at least 4 millimeters long. The underlay should run in both directions at a 45 degree angle, going left to right and then right to left, both times at an angle to the fill stitch. In making column stitches, the width of the column determines the type of underlay to be used. If your columns are less than 6 millimeters in width, use a running-stitch underlay running down the center of your column. On wider columns use a combination running stitch and zigzag stitch, making sure that the width of the zigzag stitch is 1 millimeter in from the outside of the column. (A 6-millimeter column would use a 4-millimeter zigzag stitch.)
