I picked up a 9.5lb "beef round sirloin tip roast", what kind of time am i looking at? Is this thing gonna be tough as a boot? I am gonna sound like a super newbie (whats new?) this isn't a tri tip is it? I did sort through and tried to find one that was well marbled and does have some fat on the outside. I am thinking maybe i will add a little salt pork to it.