Stitching a crown weapon

Pirate Overlord
Mar 10, 2009
I bought a crown weapon, a shooty slashy and as the wonderful sparkles and pretties are beautiful, there are times that it feels a bit ostentatious for me and I wanted to tone down the flash and keep the great stats but every time I try the weapon will not show up for selection. I made sure to match it with another shooty slashy but no go. Is this intentional?