Yes, I would not recommend it.
Or if you are set on trying it, Id recommend getting a case saver !
If that chain breaks due to wear and breaks your case, you got bigger issue's.
I know you want to try it and it might be cool. but you could easily do more damage than its worth.
If you want to compromise. I would suggest reducing the diameter and adding ontop of it a thick rubber A tight fit so it does not come off so easily.
Other than that, Id stick with polypropylene, delrin or something softer.
Sporty