Well, if Lan Huan doesn't seem to mind, then I'll let it slide.
I'm no longer surprised by the hidden skills people seem to have, but I'm afraid my attempts at modifying weapons aren't likely to yield much better results. I think if anyone can manage it, she can. I can't imagine it would be much more complicated than a bayonet, except with a retractable blade. Given the wonders I've seen in her shop, I imagine it would be a simple enough task for her.