Found the photos from the original thread. Note the resistance doesn't change, the wire has not moved, or been repeatedly heated and cooled. The length is the same, and coil wraps of course have no effect. Using short wire skews results, as the wire/coil is being stressed/ pulled due to it's short length, and tension from the grub screws. That's why a long wire is needed, to avoid that unneeded tension/ movement at the grubs.

Second photo, after same wire has multiple wraps put in it.