Very nice work.  I see no problem in replacing scabbards.  In addition to looking nice, they protect the blade.  After all, if a buyer doesn't like it, they don't have to use it. 
 
You did not mention how the leather you used was tanned.  It is best to use vegetable-tanned (or some similar non-chemical process) leather, as many commercial-scale processes acidify the leather to the point that it will rust the heck out of the blade in no time at all.
		 
		
		
		
		
		
		
		
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