I like to read threads on the forum about specific string setups and how they perform. Often folks will comment with a certain tension they like. I can string up my racket with the same setup and tension and compare their observations to my own experience... but how do I know we're really talking about the same tension? Even if it's the same number set on the machine, the effective DT could be way off. There are so many variables that affect the actual string bed stiffness other than the number punched into the machine (type of stringing machine, mounting system, clamp drawback, stringing and knot technique, time before clamping, etc). Consider the following experiment. Let's say I bought 100 PS85 frames, 100 sets of ALU Power 16, and 100 ERT 300 dynamic tension readers. I mail these out to 100 TalkTennis users at random, asking them to string the racket at 52 lbs with their normal process, and measure the DT 24 hours later. What would the data set look like? Assuming it's a normal distribution (big assumption), what would the variance and standard deviation look like? What would be the highest and lowest value? Similar question: In a TT thread, if user Dave says he likes his stringbed at 52 pounds, and Larry chimes in saying he likes it more at 50, what are the chances that Dave's stringbed is actually stiffer than Larry's? Certainly not 100%. Maybe it's closer to 50%. Just trying to get a handle on how wide the spread is. I'm starting to doubt the validity of any conversations regarding tension. I suspect my 50 lbs is actually another man's 57!