I recently placed an order for 1000 unassembled boxes from Mann Lake, with the special request that no handholds be milled on the short ends of the boxes (we groove the insides for partitions to make them 3-way mating nucs). An 8-hour drive was made up to their factory to pick up all the equipment, and upon returning home, realized that the short ends all had the handholds milled into them.
I got in touch with Chuck at Mann Lake and he immediately made arrangements to correct this. Long story short. Within a week, the factory had made new box ends w/o handholds and they were delivered for free.
Excellent customer service like this always impresses me and leaves a lasting impression.