Bunny you’re still confusing building a string versus checking the spec lenght.
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Sorry, you are the one that is confused because you do not take time to properly read the posts I have submitted. I explained what tension the string has to be built under and why it does not require clips or ties as when properly tuning the bow 1/2 or full twists have to be added or removed.
Selecting different string builders, some may use a different bowstring strand, size, material, number of strands or tensile strength. Normally the string is put on a 1/4" peg and measured to the outside of the peg. I have strings come in where the builder measured out side of the loop which would make the string too short. I have bought string and cables off Ebay listed for whatever crossbow and they were too long. Adding twists to shorten them they would twist right up, making them useless. This is where in some of my posts, I mention buying directly from the manufacture and also by doing this, one gets the newest version, whether bow string and cables, targets etc.
The strings I have purchased for vertical bows came with clips as I have received them that way, but the vertical bow still has to be properly tuned, so 1/2 or full twists have to be added or removed. Try matching a new bowstring up with cables that have had a lot of use and some have stretched due to not enough tension when they were built.
As for crossbows, a manufacture does not build everything due to the high cost of equipment which may only be good for "X" number of years for a specific model due to new bows coming out. Many parts regardless whether for bows, vehicles etc are subcontracted out and this is where problems arise for the person doing the assembly. Add into the equation, imported products where there are different metric conversions, some which are close while others are not.
An example is where Barnett's cam bearings in the Ghost 410 were a failure due to over size axle holes. The assembly person was not paying attention and installed them any way. Ordering replacements, I received the same faulty style so I would not use them and went to one piece bushings which also re enforced the axle which is mild steel. Thousands of shots later and no problems.
All the best.