Can a VEX IQ rope be shortened or repaired by re-tying it?
If not, I would propose considering this as an additional exception to the <R15> modification of parts rule, to allow ropes to be cut and re-tied in order to shorten the rope, or to repair the rope in case of a breakage. This seems within the "spirit" of some of the other exceptions (e.g. shortening metal shafts and cutting pneumatic tubing to custom lengths). It seems like the "spirit" of these exceptions are to allow certain parts to be shortened for fit, not for unfair advantage. The "Winch and Rope Pack" (currently unavailable with no ETA of re-stock) is the only way to purchase replacement ropes or different length ropes, and also the hero bot itself calls for a specific length rope which is not included in any other kits.