Oh man, this stuff is great! Thanks a ton, guys and gals! I'm adding your stuff to the post right now.

You're right, Squish: it does seem like a better idea for the Paddle of the Catfish to ground blindsense underwater. I'm not sure how to do that right now though, so I'll come back to it later.

Debby, I had honestly not considered the implications of "beaver-paddle" until this very moment.