Because I view this website as an extension of my shop I find the best way to take orders is to talk to me over the phone. They can also be done in different stones. I can also work with your stones. To some extent I can change the designs themselves around a bit.
Some modifications are more practical than others.
I don't feel comfortable changing a design so much that it doesn't look much like the one we started with. As a jeweler I tend to be a bit of a fanatic about durability. This shows up in the constraints I place on myself while designing. I like things that people can wear every day for the rest of their lives and not worry about too much. That's why just about all my work tends to not have undercuts.