Yes, everyone's lifelines will be a little different based on the variation in stanchion installation positions, how bent they currently are, variation in the bow and stern rail fabrication and installation etc. The rigger came onsite with a portable swaging machine and then fit-cut-swaged the end fittings on site, 1 by 1. You'll need careful measurements if you end up going the route of made by measurements and you'll need them a little shorter than the as measured by a few inches to be able to tension up properly.
Drew
J40