Either there's a very obvious solution that is going right over my head, or no one has ever tried to use the one in the Hlint crafting house. It's impossible to use due to the fact that NWN insists upon changing your camera angle to directly in front of the part you're trying to modify. That puts the camera into the wall, behind the loom, which obscures your view of you, so you can't see the changes that you're making.