Personalization at PDP, monogram, custom color, embroidery. Surcharge + lead-time math, how?

Magento custom-options + configurable products handle this cleanly. Three configurator pieces:

• Monogram, 3-letter text input with a font picker (4-6 fonts) and thread-color picker (Pantone-matched). $X surcharge (typically $15, $45). Lead-time bump (+1-2 weeks).
• Custom color, Pantone-matched dye lot for solid-color items (bridesmaid dresses, robes, decor). $X surcharge ($30, $150). Lead-time bump (+4-6 weeks because dyeing is batch-scheduled).
• Embroidery, position (left chest, back, sleeve), text, font, thread color. $X surcharge ($20, $80 depending on stitch count). Lead-time bump (+1-3 weeks).

The math UX: every option update re-computes the disclosed ship-by date on PDP in real time. “Order today, ships by July 8” updates to “Order today, ships by July 22” when monogram is added. Prevents lead-time surprise at checkout.

Production team gets a clean order-line export with monogram preview PDF (rendered via headless Puppeteer or ImageMagick), embroidery position diagram, and color sample reference. No back-and-forth emails clarifying spec.

Personalization typically lifts AOV 18-34% on PDPs where it’s offered. Build cost: ~$4k, $8k depending on configurator complexity. Pays back inside 90 days for any wedding gift / favor / monogrammed-accessory brand.