Im tweaking some of the vanilla NPC's, everything updates fine ingame except the weight changes. They all remain at their vanilla weight stats. I've tried making it a ESM and yeah, i've exported everything with Ctrl-F4.
No searching in this forum has produced anything that works for me. Is there some kinda special trick to this? Or can't it be done?
Edit: The weight changes show up fine in the preview window by the way.