I have been shooting a knight wolverine with #11 percussion caps for years, but that gun has been commandeered by the lady friend. So I went to an optima v2. To be honest I want to get back to shooting a knight and found what I think to be a pretty good deal on WhT they are calling a Knight disc extreme that is unfired. Asking price is 300$. I am unsure if this is an original disc or indeed an extreme. Hoping for some insight. Which of the two is more desirable? Can either or shoot BH209? Is 300$ fair for this rifle? Loads of questions and will have more if I do jump on it. Last one for now… would I be better off getting a mountaineer or ultra lite? Thanks in advance