I'm messing around with a item data extractor and a few items are tripping me up. Specifically, unimplemented recipes. For example, ID: 52497 wasn't implemented, but the various Item querying things all show that it's valid.
The only sign I have now is that the tooltip seems to never finish updating (the item it should craft stays at "Retrieving item information"). I hate to rely on that behaviour because there are delays in getting that info and I'd like something more reliable.