The initial try seemingly compatible with all illustrous checkpoints derived from IllustrousXL 0.1.
Illustruos models seem to lack knowledge regarding butterfly_knife or balisong.
The model is supposed to use one of the tags "balisong" or "holding_balisong". In the former case a balisong is not being held.
DON'T USE THIS MODEL FOR QUALITY IMAGES -- IT'S RAW AND UNDERTRAINED
The whole purpose of this post is to get links to ask people what I've done wrong.