I'm not sure if this is the right place to be putting this, but I noticed that the article for Shin says that he's started using Ouki's Glaive by the time he became a 4,000 man commander. This seems to be incorrect as all the more recent battles show him wielding an entirely different glaive. I believe this is a mistake due to a panel perhaps showing his glaive at just the right angle to make it seem like it is Ouki's.
Reference Ch. 172 Pg. 15 for a clear image of Ouki's Glaive
Reference Ch. 417 Pg. 14 for a clear image of Shin's current Glaive
I can't see why he would use it breifly only to put it away again.