Haven't tied a lot on my vice yet. Guess I'm not too edjumucated for this topic. But.....I don't like looking down at the fly. I have a somewhat lower chair....one of those crazy back support chairs, where you place your front knees...?...hoof......just kiddin', where you put your knees on a pad and your hiney on the higher pad. Your back is then sorta straight. I use the extension for my c-clamp in addition to the standrod, on the pedestal base, just to get the vice jaw higher. Higher like Mr. Williams stated above. I look almost directly at my fly....uh.....the fly. Sorry, just my 2 cents. bye