Well, XF is generally not preferred these days, and th!nk stated the reason on the previous page...
I'll just reiterate it- XF has no recoil-handling capability.
But considering that Duo has extremely low recoil (which means XF won't need to handle a lot of recoil), and on XF it can outspin things better, then maybe its worth the try...
EDIT- Beaten by N0body...
Wow, I was beaten by no one, but was still beaten by someone!
I'll just reiterate it- XF has no recoil-handling capability.
But considering that Duo has extremely low recoil (which means XF won't need to handle a lot of recoil), and on XF it can outspin things better, then maybe its worth the try...
EDIT- Beaten by N0body...
Wow, I was beaten by no one, but was still beaten by someone!