I have been using the standard ronver dark lig that came with my jody jazz dv tenor piece and my sound is just a tad shrill and low notes are not as responsive as my hr soloist. I tried out my friend's vandoren optimum lig he got for his v16 and my sound immediately improved. The only problem was the ligature did not have a secure fit on the mouthpiece. Are there any sizes that fit? Also, I have been looking into trying the jj ring lig, the olegature, and possibly any other recommendations that I get from here. What ligs (and sizes) would you guys recommend?