Snoopy...
I work with this stuff everyday,, I'm not quite sure what you are asking..
You are talking about carbon fiber patterned Concealex Right?
You want to remove the belt loop,, make it a tighter fit and turn it into a neck knife?
Easily done,, if you are careful...
Remove the posts holding the belt loop on,, remove the knife from the sheath and gently warm an area of the sheath where you want to make the adjustment..
When it starts to get soft,,insert the knife and form it tighter around the handle,,or make a slight dimple in the sheath, about an inch or so where the handle enters the sheath. This will have to be done with the knife out..
The dimple will give it extra tension and enable you to wear upside down. Drill two holes at the end of the sheath and insert your cord...
If all else fails,,you can send it to me,,and I will tighten it up for you...
If you have any more questions,, feel free to e-mail me at ericn@mnsi.net I'll help you as much as I can under these conditions...
Goodl luck, you should have no problem with it..
ttyle Eric..
On/Scene Tactical
http://www.mnsi.net/~nbtnoel
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Eric E. Noeldechen
On/Scene Tactical
www.mnsi.net/~nbtnoel