Sorry to make two threads in rapid succession, but this is totally unrelated to my other thread but also bothering me. A number of feats require you to be using a weapon, and claws are unarmed. However, claw blades, which are designed as replacement claws for clawless catfolk, are a weapon, and thus can be used with these feats (such as Double Slice). Now, obviously, this can be house ruled in whatever way, but it seems like a bit of an oversight.