Nope, I haven't heard or seen them on another Trump. I like the looks of them. I have always had a weakness for fishtails. They have to be louder than the stock Speedmaster pipes though (I think anything will be).
I am not real sure about how I am going to hang them yet. I am hoping I will be able to use the stock hangers that we already have. I'll get it figured out somehow.
Soren