All I can say here is dry run, dry run, dry run. Practice several times estimating as best as you can times and heat loss. When I had to sub I bought 2 small digital thermometers and gutted one and found the location where the beeper was inside of the first one (destroying it in the process) and then drilled a hole in the second one and using a wire, I pulled the brass contact off the beeper and filled with silicone caulk. That way I had a no noise thermometer, that I knew was accurate. If you know any one that has taken this test at this place before what you can learn from the about the way the test is conducted could prove very valuable to you.Best of luck to you. Maybe a politician some where will put an end to good people having to sell their 4th ammendment rights for a job sometime in our lifetime.
STIMPY21