Has anyone swapped out different bing needles, I have noticed the new bings come with shorter ones (richer) than the old bings. Also aren't there several different diffuser sizes on bings what sizes are you guys running? I know what ur talking about bings not being very good at full range mix operation. but couldn't this problem be rectified by examining the needles and diffusers, as well as possible playing with the size of the idle hole and slide cutaway etc.