The guys at RDI were very professional. They set up their equipment and in a short time they were able to identify a problem that was not obvious to the naked eye. We made a quick adjustment to see if it made any difference. They took another measurement and were able to quantify the improvement in real time. The damage that was being caused was not evident to the naked eye and it was costing us thousands in repairs and downtime. We would not likely have stumbled across the fix that they were able to find in one morning.Andrew Sexton, Plant Manager with Air Liquide