Piper did a Pather version didn't they, in 1995 I think the released it? It had all the bells and whistles on it.
The Panther, I believe, was only available on the 31-310 model.
Had winglets and four blade props (ones I saw, were bent at the tips as well).
It/they set a few speed records during some air races from memory.
Pretty mean looking machine too.