GEMPAGES SETUP: 1. Put CSS class gcp-packq-form on the section containing your custom fields. 2. Use these exact Field Names:   material, pages, flute, length, width, height, quantity 3. Dropdown option values should match PackQ's wording exactly. 4. A button whose visible text includes "Update Price" will sync the form. 5. A button whose visible text includes "Personalize", "Design My Box",   "Design Online", or "Start Designing" will sync and open PackQ's editor.