Hi there! Thank you for reaching out. I am very interested in your project and am available to work on it. I would be happy to create a 3D model of the pendant you want, taking into account the dimensions and weight you have indicated.
Additionally, I can ensure that the 3D model is designed in a way that allows for easy modification of the front and back, according to your needs. Finally, I can also provide you with a rendering of the model so you can visualize what the pendant will look like once it's completed.
If you have any other questions or need further information, please don't hesitate to ask. I look forward to potentially working with you soon!