Its one thing if they are coordinated but most of the time I see this situation, they are not. You and the people you work with may truly understand what you are doing and will coordinate the fuses, but I see far too often people who don't understand and will not listen to a lowly contractor. In the end, as long as it doesn't violate code and simply cost the customer more, who am I to tell them differently?409.21(B) allows the buss head to cover but ... our buss heads are high enough a lift is required. Therefore two men, harnesses, tie-offs, and 15+ minutes for a lift to arrive. That versus one man who can walk up to the panel. One fuse blown at the buss and we've paid for having fuses added to several panels. But you get to submit prints to us and we'll tell you up front it's what we want. Then we coordinate the buss.