Shan't.
The newer Sporter has a better trigger, the old one was passable at best, and it has a much beefier breech latch, and the old pressed steel safety catch was awful. As well as the rear block being made of some kind of cheesy alloy.... If Feinwerkbau had built the Sport to the same standards as the Feinwerkbau 300 then you would have a case. But it didn't.
Get the newer one and pimp that.