I was just basing it off of this image of the fixed lightsaber arm. I would just think that they'd make it so the permanently fixed gloved hand would be up higher.
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As we've already dissected that the photos are playing some tricks, the position of the hand relative to the hilt in this photo are not cast in stone, nothing says that's an actual wired, finished saber arm and not just a regular arm and hilt propped in place for a photo to just show off what's in the box.