No, the weld errors occur when exporting, and they are entered in the sanity check results as (along with the long list of verticies):
###### Vertices in lshandle01 need to be welded
###### Vertices in plane240 need to be welded
###### Vertices in plane241 need to be welded
The half-way visable problem can be seen in the post I had linked to (
http://www.lucasforums.com/showpost.php?p=1835835&postcount=4)
EDIT:
Also, if I take the w_lghtsbr_001 from kotor tool, open it up in nwmax then:
1. Take note of anything linked to the old AuroraBase (only Dummy01)
2. Delete the old AuroraBase,
3. Create a new one (w_Lghtsbr_001 like the old one)
4. Relink Dummy01 to the new AuroraBase.
5. Export the model through the new AuroraBase
I still get the sanitycheck error just like on my own model, but it does export, and the hilt looks just fine in game. The only problem is the blade, which looks just like the images shown in the post I linked to above this edit.