I just wanted to say hey and let folks know I am a mobile air conditioning engineer and do wind tunnel testing on automobiles.I occasionally have a need for education on some of my support equipment for the test cell and looks like this would be a good place to get some knowledge so i can make good decisions for my company. If I can help any of you folks in the "mobile" HVAC world please let me know. I have been in the business for 22 years and will do my best.