Thank you ame. Yup they did a CAD for me. Now I requested for the wax. They said they could do a wax for me. They said however, the wax would not be an accurate reference for the exact dimensions of the ring.This is because, the wax is made to take into account of gold weight loss and polishing. Hence, it will be roughly and thicker than the finished ring.
I still insisted on the wax. They do not carry lower than a G colour,vs2 in their store and the upgrade policy would be based on the specs that they carry. But they made an exception to custom cut a G,H,I,vs1 to vs2 for me. In the end, the diamond turns out to be a G,vs1 but i haven get to see it yet because it is still in AGS lab.