I've reformed a couple of sheaths that have gone soft or lost their shape a touch Tom, I don't see why it wouldn't work okay.
Should work OK.
Just soak it in some warm water until soft them form it. You may need to re-wax/treat it afterwards and make sure its fully dry before you leave a knife in it - O1 goes a nice shade of orange in a damp sheath![]()
Richard
How long should I leave a (cling filmed) knife in the newly wetted sheath in order to take the new form?