Step 1. Lay a side of leather on your workbench and closely position four panel patterns on it. With a sharp utility knife, cut the leather around the patterns.
Step 2. Transfer the leather to your die press. Carefully position your cutting die on the leather and punch out each panel.
Step 3. Sew a liner into the flesh side of each panel.
Step 4. Return two of the panels to the die press and with a special die, cut out the lace holes.
Step 5. Punch out a hole for the air valve.
Step 6. Brand your logo onto the ball.
Step 7. Sew the bottom panels together.
Step 8. Sew the lace hole reinforcements and bladder guard in place.
Step 9. Sew the top panels together.
Step 10. Invert the bottom panels and insert into the top panels.
Step 11. Sew bottom and top panels together.
Step 12. With a stout stick, and strong muscles, invert the ball so that it is right side out.
Step 13. Insert a new rubber bladder, position the bladder guard, and partially inflate the ball.
Step 14. Lace the ball closed; trim the excess lace.
Step 15. Fully inflate the ball and admire your work.