I think the most interesting part of the NR was that the client identified the furnace and the specific burners to replace. To me that implies they are not replacing all the burners in the furnace. So either a hybrid of old and new burners or it takes less plasma burners to do the job. This would be another huge benefit if they require less burners, a huge cost savings. Their tests with the first one they bought may have showed them the plasma torch is more efficient and therefore would need less torches than burners.