With regard to the Tickets for Woocommerce plugin, is there a way for me to add custom fields to the customer input area? We’re planning to sell tickets to card game tournaments, and we need the customer to enter their DCI number (a number used to track stats and register for official Wizards of the Coast events among Magic the Gathering players). Can I add a field to the customer information section for the customer to enter their DCI number? I’m super interested in this plugin, and this feature would make my purchase.