Confirm the hole pattern, document length, binding edge, punch margin, and whether the machine is designed for plastic comb binding. The comb diameter does not determine the hole pattern, so a 9/16 inch spine will not correct documents punched for another binding style. Standard letter work commonly uses a comb pattern suited to its width, while shorter or longer formats may require disengageable pins or a controlled punch setup to avoid partial holes. Covers should be punched separately when their thickness exceeds the normal paper lift. Run one complete sample through the punch, load it onto a comb, and close the spine. This confirms hole alignment, margin strength, and finished fit before supplies are ordered for a larger job.