Something that's been bothering me lately is the tension discrepancy between constant pull machines vs lock out machines. Thus, I would like a bit of clarification/make sure that I am correct. Is the difference that ultimately results in tension simply due to the fact that constant pull machines take into account the stretching of the string? Essentially, do all machines pull the same tension (say 60 pounds)? Then, when a lockout machine simply ceases to pull, tension drops due to the stretching of the string?