Hi @MathieuMalige ,
It sounds like you have a very specific and detailed customization process in mind for your engravings. I highly recommend trying out Customall Product Personalizer. Our app is built to handle exactly these kinds of custom product options, including engraving features.
With Customall, you can easily add a “Personalize” button to your product pages, create pop-ups with different engraving positions and images, and allow customers to input their engraving text. The app will automatically add the engraving fee to the order, and you can set up different engraving options for specific product groups, just as you described.
Plus, in the backend, you’ll be able to clearly see which orders include engravings and the text requested by the customer, making order management straightforward.
Feel free to give it a try and see how it works for your site! 