That still defeats the point of a custom in my eye. If you (putter maker) can't/won't deliver EXACTLY what's on your customer's order sheet, that needs to be communicated with the customer.
Whether it's based on some kind of policy (such as a putter must have the maker's name stamped, putter specs, etc.) or an issue with the build itself. The end result of it still looking cool is irrelevant if it's not what the customer ordered. That's the entire point of custom putter builds. I as the customer can get exactly what I want. If what I want needs to go through some design filter of the maker's, that's totally understandable, but I would like that communicated with me before I drop a lot of money and wait months and months for the putter to arrive only to receive something different (even if only slightly) than I ordered.